(i) P, Q, R, S, T and U are six members of a group of which three are males and three are females.
(ii) There are two engineers, two lawyers, one teacher and one doctor in the group.
(iii) Q, T, P and R are two married couples and no person in this group has the same profession.
(iv) T, a teacher with blue dress, married a male lawyer with brown dress.
(v) Colour of the dresses of both the husbands and that of both the wives is the same.
(vi) Two persons have blue dress, two have brown and the remaining one each has black and green.
(vii) P is a male engineer whose sister S is also an engineer.
(viii) P is a male engineer whose sister S is also on engineer.
(ix) Q is a doctor.
What is the colour of U's dress ?