Read the following information and answer the questions that follows:
A family consists of six members P, Q, R, S, T and U.There are two married
couples. Q is a doctor and the father of T. U is the grandfather of R and is a
contractor S is grandmother of T and is a housewife. There is one doctor, one
contractor, one nurse, one housewife and two students in the family.
Which of the following is definitely a group of male members?
(1) QU
(2) QUT
(3) QUP
(4) UT