Correct Answer: L × M – N & O

Solution : Given:
A & B means A is the sister 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 son of B.

Now, let's check the options –
First option: L & M × N – O
According to the given information, the family tree will be –

From the above family tree, L is the paternal uncle of O.
Second option: L × M – N & O
According to the given information, the family tree will be –

From the above family tree, it's clear that L is the father of O.
Third option: L × M – N × O
According to the given information, the family tree will be –

From the above family tree, it is evident that L is the father-in-law of O.
Fourth option: L @ M – N & O
According to the given information, the family tree will be –

From the above family tree, it's clear that L is the brother of O.

So, only the second option fulfils the relation as per the family tree. Hence, the second option is correct.