A is the brother of B. C is the sister of A. How is C related to B?

A. SISTER

P is the father of Q. R is the sister of P. How is R related to Q?

A. AUNT

If A is the son of B and C is the daughter of B, how is C related to A?

A. SISTER

A is the daughter of B. C is the son of B. How is C related to A?

A. BROTHER

H is the daughter of I. J is the son of I. How is H related to J?

A. SISTER