The following question pertains to the given information :

1. A + B means A is the mother of B.

2. A - B means A is the sister of B..

3. A * B means A is the father of B.

4. A β B means A is the brother of B.

Which of the following indicates that "N is the maternal uncle of M" ?

Decoding symbols:

So,

Option 1) Q * N * M + P ⇒ Q is the father of N who is the father of M who is the mother of P.

Here, N is the father of M.

Option 2) P + N * M * Q ⇒ P is the mother of N who is the father of M who is the father of Q.

Here, N is the father of M.

Option 3) Q β M β N * P ⇒ Q is the brother of M who is the brother of N who is the father of P.

Here, N is the brother of M.

Option 4) N β P - L + E - M ⇒ N is the brother of P who is the sister of L who is the mother of E who is the sister of M.

Here, N is the maternal uncle of M.

Hence, "Option 4" is the correct answer.