In a certain code language,
‘A = B’ means ‘A is the sister of B’,
‘A $ B’ means ‘A is the brother of B’,
‘A @ B’ means ‘A is the wife of B’ and
‘A * B’ means ‘A is the father of B’.
How is Q related to U if ‘Q * W = R $ T @ U’?

Given: ‘A = B’ means ‘A is the sister of B’,
If ‘Q * W = R $ T @ U’?

Q is Wife's father of U.

Thus, correct option is (b).