Explanation:

Let’s break this down, step by step:

- U + H: U is the father of H

- H × L: H is the brother of L

- So, U is L’s father (since H and L are siblings, both children of U)

- L - Q: L is the sister of Q

- Now, U is Q’s father, H is Q’s brother, L is Q’s sister

- Q ÷ R: Q is the mother of R

- That makes L the sister of Q, so L is R’s maternal aunt

- R - Y: R is the sister of Y

- So, L (maternal aunt of R) is also the maternal aunt of Y, because Y and R are siblings, both children of Q

Here’s what that means for the options:

1. Mother’s brother: No, L is not Y’s uncle.

2. Mother’s sister: Yes, L is Q’s sister and Q is Y’s mother. This fits.

3. Sister: No, they’re aunt and niece/nephew, not sisters.

4. Maternal grandmother: No, L is Q’s sister, not Q’s mother.

So the correct answer is option 2: Mother’s sister.