‘A + B’ means ‘A is the son of B’, ‘A – B’ means ‘A is the daughter of B’, ‘A & B’ means ‘A is the father of B’ and ‘A@B’ means ‘A is the mother of B’. If P @ Q & S + R, then how is P related to R?
1
Grandmother
2
Wife
3
Mother-in-law
4
Daughter-in-law