U $ V means ‘U is the sister of V’
U @ V means ‘U is the husband of V’
U * V means ‘U is the son of V’
U $$\div$$ V means ‘U is the mother of V’
If O $ P * B @ F, how is O related to F?

A

Sister

B

Brother

C

Daughter

D

Daughter-in-law