Correct Answer: Both conclusions I and II follow

Solution : The possible Venn diagram according to the given statements is as follows –

Let's analyze the conclusions –
Conclusion (I): Some elephants are tigers – From the Venn diagram, the circle of a tiger is completely inside the circle of the elephant. Therefore, this conclusion is true.
Conclusion (II): Some elephants are chimpanzees – From the Venn diagram, the circle of chimpanzees intersects with the circle of elephants and has a common area between them. Therefore, this conclusion is true.

So, both conclusions I and II follow. Hence, the third option is correct.

Correct Answer: 28.6 %

Solution : According to the question
Number of cars in 70 - 80 km/h range(A) = 90
Number of cars in 50 - 60 km /h range(B) = 70
Use: A is more than B in percentage  = $\frac{(A- B)}{B}$×100
⇒ Required percentage = $\frac{90 - 70}{70}$×100 
= 28.56% ~ 28.6%
Hence, the correct answer is 28.6%.

Correct Answer: 0.25

Solution : Given:
?, 5, 30, 186, 1309, 10480

Multiply and add the sequential natural numbers to the previous term of the series –
(5 × 5) + 5 = 25 + 5 = 30
(30 × 6) + 6 = 180 + 6 = 186
(186 × 7) + 7 = 1302 + 7 = 1309
(1309 × 8) + 8 = 10472 + 8 = 10480
Similarly, (? × 4) + 4 = 5→(? × 4) = 1→(?) = 0.25

So, 0.25 is the missing term of the given series. Hence, the first option is correct.

Correct Answer: 31 years

Solution : Let the present age of the father and son be F and S years respectively.

The father's present age is 1 more than 5 times his son's age ⇒ F = (5 × S) + 1
Father's age after 3 years = (5 × S) + 4
Son's age after 3 years = S + 3
After 3 years, the father's age would be 2 less than four times the son's age.
⇒ (5 × S) + 4 = 4 × (S + 3) – 2
⇒ (5 × S) + 4 = (4 × S) + 12 – 2 = (4 × S) + 10
⇒ S = 6
⇒ F = (5 × S) + 1
= 5 × 6 + 1 = 30 + 1 = 31 years.

So, the present age of the father is 31 years. Hence, the third option is correct.

Correct Answer: 3

Solution : Use the formula, $\text{Average} = \frac{\text{The sum of all values}}{\text{The total number of the values}}$.
The average number of trees planted in state A over the years $=\frac{70+90+78+92+100}{5}=\frac{430}{5}=86$
There are 3 years in 2015, 2016, and 2018 in which the number of trees planted in state B is more than the average number of trees planted in state A over the years.
Hence, the correct answer is 3.

Correct Answer:

Solution : As per the mirror image properties, closer things appear close to the mirror in the reflection.
So, according to the above property and the information provided, the mirror is placed on the right side of the figure (on line XY). So, the left side of the reflected image will appear as the right side and the right side will appear as the left side. However, the top and bottom of the reflected image will remain the same.
Thus, the correct mirror image of the given figure will be –

Hence, the first option is correct.

Correct Answer: Sundarbans

Solution : The correct answer is Sundarbans.

A wetland is an area of land that is either covered by water or saturated with water. Sundarbans is the largest protected wetland in India. Sundarbans is a Mangrove area formed in the Bay of Bengal, and there are more than 70 wetlands in India. Chilika Lake in Odisha and Keoladeo National Park in Rajasthan were recognised as the first Ramsar sites in India.

Correct Answer:

Solution : Since the rotation is restricted. So, the embedded figure will have the same orientation as the main figure. By comparison of all the option figures, the given question figure is embedded only in the fourth option figure.

Hence, the fourth option is correct.

Correct Answer: ALV

Solution : Given:
GAYATRI : AAR :: PALLAVI : ?

If we take every other letter of the word GAYATRI, we get the sequence AAR. (GAYATRI)
Thus, GAYATRI is coded as AAR. 
Similarly, if we take every other letter of the word PALLAVI, we get the sequence ALV. (PALLAVI)

Thus, PALLAVI is coded as ALV. Hence, the fourth option is correct.

Correct Answer: (1826, 1472)

Solution : Let's check the options –
First option: (1826, 1472); 1826 – 1472 = 354 
Second option: (1984, 1505); 1984 – 1505 = 479
Third option: (1805, 1326); 1805 – 1326 = 479
Fourth option: (2136, 1657); 2136 – 1657 = 479

So, only the first option is different from the other three options as here the difference between the numbers is 354 instead of 479. Hence, the first option is correct.