A is the father of X, B is the mother of Y. The sister of X and Z is Y. Which of the following statements is definitely not true?
A
B is the mother of Z
B
X is the sister of Z
C
Y is the son of A
D
B has one daughter
Correct Option:
C
Explanation
The statement explicitly says Y is the sister of X and Z. Therefore, Y is female. Calling Y the son of A is definitely impossible, making statement (3) the false one.
