49. If P @ Q means P is the father of Q; P $ Q means P is the sister of Q; P * Q means P is the brother of Q, then how is A related to E in the expression A $ B @ C * D @ E?
A. Aunt
B. Niece
C. Sister
D. Cannot be determined
50. R is the mother of S and T is the brother of S. U is the husband of R. How is T related to U?
