Let’s analyze both statements to see if they provide enough information to answer the question:
- Statement I: "Q is the son of R."
This statement gives us information about Q's relationship with R, but it does not provide any information about P's relationship with R. Hence, Statement I alone is not sufficient to answer how P is related to R.
- Statement II: "Q is the brother of P."
This statement tells us that Q and P are siblings, but it does not provide any information about R's relationship with P. Hence, Statement II alone is not sufficient to answer how P is related to R.
- Combining Statements I and II:
By combining both statements, we know that:
- Q is the son of R (from Statement I),
- Q is the brother of P (from Statement II).
This allows us to infer that P is also the child of R. Therefore, P is R's child.
Hence, Statements I and II together are needed to answer the question. The correct answer is (C).