A + B means ‘A is the mother of B’
A - B means ‘A is the father of B’
A $$\times$$ B means ‘A is the sister of B’
A $$\div$$ B means ‘A is the daughter of B’
If P + R $$\times$$ T - Q $$\div$$ S + U, then how is S related to T ?

A

Daughter

B

Sister

C

Mother

D

Wife