F + M means ‘F is the husband of M’
F ÷ M means ‘F is the daughter of M’
F − M means ‘F is the father of M’
F × M means ‘F is the mother of M’
If U + V × K - B, then how is U related to B?

A

Paternal grandmother

B

Paternal grandfather

C

Maternal grandmother

D

Father