A is father of X; B is mother of Y. The sister of X is Z and Y. Which of the following statements is definitely not true ?

[amp_mcq option1=”B is the mother of Z” option2=”X is the sister of Z” option3=”Y is the son of A” option4=”B has one daughter E. B is the wife of A” correct=”option2″]

The correct answer is: B. X is the sister of Z.

Explanation:

• A is the father of X.
• B is the mother of Y.
• The sister of X is Z and Y.

From the above information, we can infer that:

• X and Z are siblings.
• Y is the brother of X and Z.
• B is the mother of X and Z.
• A is the father of X and Z.

Therefore, the statement “X is the sister of Z” is definitely not true.