Correct Answer: The scholar had been regarded as a usurper by the French.

Solution : The correct choice is the fourth option.

Passive voice is the voice in which the object experiences an action rather than the person who performs the action. Hence, the object in the active sentence becomes the subject in the passive voice.

The structure of the passive voice in the case of the past perfect tense is: "Singular object + had + been + past participle of the main verb + adverbial phrase + by followed by the agent of the action."

Therefore, the right answer is: "The scholar had been regarded as a usurper by the French."

Correct Answer: He had seen the picture 

Solution : The fourth option is the correct choice.

Explanation:

In this case, "he had seen the picture" suggests that Abu saw the picture before a certain point in the past, possibly before he mentioned it or before another event occurred. The past perfect tense is used to indicate an action that was completed before another past action.

Correct Answer: 2

Solution : The second part of the sentence has an error.

Note that "science and technology" is a compound subject. So, "their fallouts" is not the right usage. We need to treat the compound subject as a singular noun. Therefore, the correct possessive term to be used is "its fallout".

Hence, the correct sentence is: "Science and technology and its fallout do not complete human culture."

Correct Answer: 3, 1, 2, 4

Solution : Given:
1. Maternity 2. Matriarchy 3. Matchbox 4. Matricide

Step 1: Since all the words start with the same letter M, so move on to the next letter.
Step 2: The second, and third letters of each word are the same, i.e., a, and t. So, move on to the next letter.
Step 3: Compare the fourth letter of (Maternity, Matriarchy, Matchbox, Matricide). Matchbox will come before Maternity, Matriarchy, and Matricide as c comes before e, and r according to the alphabetical system. Similarly, Maternity will come before Matriarchy, and Matricide as e comes before r according to the alphabetical system.
Step 4: The fifth letter of (Matriarchy, Matricide) is the same, so move on to the next letter.
Step 5: Compare the sixth letter of (Matriarchy, Matricide). Matriarchy will come before Matricide as a comes before c according to the alphabetical system.

So, the sequence is Matchbox, Maternity, Matriarchy, Matricide, or 3, 1, 2, 4. Hence, the first option is correct.

Correct Answer: $\frac{\sqrt{5}}{5}$

Solution : Given: $\sec\theta + \tan\theta = \sqrt{5}$
To find the value of $\sec\theta - \tan\theta$
We know,
$\sec^2\theta -\tan^2\theta = 1$
⇒ $\sec\theta -\tan\theta=\frac{1}{\sec\theta + \tan\theta}$
So, $\sec\theta - \tan\theta = \frac{1}{\sqrt{5}} = \frac{\sqrt{5}}{5}$
Hence, the correct answer is $\frac{\sqrt5}{5}$.

Correct Answer: Fungi

Solution : The correct option is fungi

A type of fungus called Dermatophytes is the cause of ringworm. It has an impact on the skin, scalp, and nails. Ringworm is contagious and can be passed from person to person, from animal to person, or from infected objects. Depending on the degree and location of the infection, antifungal creams or oral drugs are commonly used to treat it.

Correct Answer: proud

Solution : The most appropriate option is the fourth option.

Explanation:
Proud means feeling a deep satisfaction or pleasure as a result of one's achievements, qualities, or possessions. In the context of the passage, knowing about one's culture and the origin of one's family heritage typically brings a sense of pride and connection to one's roots.

The meanings of the other options are as follows:

• Thoughtful means showing careful consideration or thought.
• Grumpy means bad-tempered or irritable.
• Innocent means free from guilt or wrongdoing.

Therefore, the correct answer is proud.

Correct Answer: Extravagant

Solution : The correct choice is the fourth option.

Extravagant means excessive or lacking restraint, making it an antonym for "frugal". In the context of the sentence, it describes the high prices people are willing to pay for houses.

The meanings of the other options are as follows:

• Prices: This word is related to the concept of cost but does not provide an opposite meaning to "frugal".
• Accommodation: This word refers to the provision of housing or lodging. While it is mentioned in the sentence, it does not convey the opposite meaning of "frugal".
• Present: This word refers to the current time and is not an antonym for "frugal".

Correct Answer: Sister

Solution : According to the given information, the family tree will be –

Here, the quadrilateral represents the male, and the circular figure represents the female in the figure.

So, from the above family tree, it is clear that the girl is the sister of Rajan. Hence, the first option is correct.

Correct Answer: 2

Solution : The error lies in the second part of the sentence.

The phrasal verb "look forward to" is followed by a gerund, which is a verb form ending in (-ing). Gerunds are used as nouns. In this sentence, the gerund "meeting" is the object of the phrasal verb "look forward to".

The correct sentence should be: "They are looking forward to meeting their parents."