Question: How is X related to Y ?
Statements:
Y and Z are children of D who is wife of X.
Rs sister X is married to Ys father.
I alone is sufficient while II alone is not sufficient
II alone is sufficient while I alone is not sufficient
Either I or II is sufficient
Neither I nor II is sufficient
Explanation:
From I, we conclude that Y is the child of D who is wife of X i.e. X is Ys father.From II, X is married to Ys father. This implies that X is Ys mother.
From I, we conclude that Y is the child of D who is wife of X i.e. X is Ys father.From II, X is married to Ys father. This implies that X is Ys mother.