Question

K is the brother of N and X. Y is the mother of N and Z is the father of K.
Which of the following statements is not definitely true?

• A. K is the son of Z.
• B. Y is the wife of Z.
• C. K is the son of Y.
• D. K is the father of X.
• E. N is the brother of X.

Answer 1

Answer: (E)

N is the brother of X.

K is the brother of N and X.

So, Y, who is the mother of N and Z, who is the father of K, will be the mother and the father of all three.

However, it is not mentioned whether N is male or female.

so option E cannot be stated with surety.

option E