Correct Option (3)
The given relational definitions are:
- A + B means A is the son of B.
- A - B means A is the wife of B.
Applying these rules to the expression P + R - Q:
- From P + R: According to the first rule, P is the son of R. This establishes P as male and R as a parent of P.
- From R - Q: According to the second rule, R is the wife of Q. This establishes R as female and Q as male (husband of R).
Combining these deductions:
- P is the son of R.
- R is the wife of Q.
Therefore, R is the mother of P, and Q is the husband of R. Consequently, Q is the father of P.
Incorrect Options:
Based on the derived relationship that Q is the father of P:
- Option 1 (Q is the son of P) is incorrect, as Q is the father, not the son, of P.
- Option 2 (Q is the wife of P) is incorrect, as Q is male and the father of P, not the wife.
- Option 4 (None of the above) is incorrect because option 3 accurately represents the relationship between Q and P.