If 'A + B' means 'A' is daughter of 'B', 'A - B' means 'A' is husband of 'B', 'A × B' means 'A' is brother of 'B'. What does the relation 'P × Q - R' show?

Family tree

Decoding the Symbols:

Given relation: P × Q - R

Let's break it down:

P × Q means 'P is brother of Q'. (P is male)

Q - R means 'Q is husband of R'. (Q is male, R is female)

Let's check the given options:

1) P is son-in-law of R - Incorrect. P is R's husband's brother.

2) P is brother of R - Incorrect. P is brother of Q, who is R's husband.

3) R is wife of P - Incorrect. R is wife of Q.

4) None of the above - Correct, as none of the above options accurately describe the relationship.

Hence, the correct answer is "Option 4".