A and B are brother. L is the son of B. L is brother of J, and N is son of J. How N is related with A?

Son Brother Grandson Father

Grandson

Explanation: ↑ or ↓ ⇒ Upward or downward line shown "generation gap" .    =    ⇒ Double lines shown "relation b/w Husband & Wife"    —   ⇒ single line shown "relation between them other than Husband & Wife". Clear from chart, N is Grandson of A.