O is the son of P. Q is the daughter of R, who is the brother of P. How is Q related to O?

A. COUSIN

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

A. SISTER

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

A. SISTER

D is the daughter of E. F is the brother of E. How is D related to F?

A. NIECE

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

A. NIECE