Explanation:

Let's break down the given symbols in the statement:

- Q % P: Q is the wife of P

- P © R: P is the father of R

- R * S: R is the husband of S

- S & T: T is the sister of S

Now let’s figure out how T is related to R:

- Since S is R's wife (from R * S), and T is the sister of S (S & T),

—> T is S's sister and therefore, R's sister-in-law.

Options:

1. Son-in-law — Incorrect, as T is female.

2. Father — Incorrect, as T is not a parent.

3. Mother — Incorrect, as T is not in a parental role.

4. Grandson — Incorrect, as T is not a descendant.

5. Sister-in-law — Correct, T is R’s sister-in-law.

Correct Answer:

- Option 5: Sister-in-law