Q. Consider the Question and two Statements given below:

# Question: Is Z brother of X?

Statement-1 : X is a brother of Y and y is a brother of Z.

Statement-2 -: X, Y and Z are siblings.

Which one of the following is correct in respect of the Question and the Statements?

a. Statemcnt-1 alone is sufficient to answer the Question

b. Statement-2 alone is sufficient to answer the Question

c. Both Statement-1 and Statement-2 are sufficient to answer the Question

d. Both Statement-1 and Statement-2 are not sufficient to answer the Question

Correct Answer: d. Both Statement-1 and Statement-2 are not sufficient to answer the Question

#### Question from UPSC Prelims 2022 CSAT Paper

**Explanation : **

## Is Z brother of X?

Statement 1:

X is the brother of Y, and Y is the brother of Z.

But we do not know whether Z is a male or a female. So, we cannot say whether Z is the brother or sister of X.

Statement 2:

X, Y, and Z are siblings. It tells us nothing much. Here, also gender of Z is not known. So, Z can be either brother or sister of X.

Even if we combine the two statements, we cannot answer the given questions.