If P + Q means P is the brother of Q, $$P \times Q$$ means P is the mother of Q, $$P \times Q$$ means P is the father of Q and P - Q means Pis the sister of Q, If $$A \times B \div C - D + E - f$$ , then how is E related to A?

A

Sister

B

Son's daughter

C

Daughter

D

Mother