A @ B means ‘A is the husband of B’.
A & B means ‘A is the mother of B’.
A # B means ‘A is the daughter of B’.
A % B means ‘A is the sibling of B’.
If R % Y & D @ G # M, then M’s son-in-law is the ________ of R.

A

sister’s son

B

son

C

brother

D

grandson