SSC JE Mechanical Engineering 2017 Set 1 Paper

Condition (1) ⇒ A @ B = A is the father of B. So M @ N = M is the father of N. That is, N is the son of M
Condition (2) ⇒ A # B = A is brother of B. So L # M = L is brother of M.
Condition (3) ⇒ A! B = A is the son of B, So N! O = N is the son of O. That is, O will be the mother of N. Because M is N’s father. So M will be the husband of O. And L, N’s uncle.