‘A = B’ means ‘A is the son of B’
‘A * B’ means ‘A is the mother of B’
‘A % B’ means ‘A is the husband of B’
‘A $ B’ means ‘A is the sister of B’
If ‘X $ D = M * N’, then how is M related to X?

A

Sister

B

Mother

C

Paternal grandmother

D

Daughter