Correct Answer: P ÷ R – Q

Solution : Given:
A – B ⇒ A is the mother of B
A + B ⇒ A is the father of B
A ÷ B ⇒ A is the sister of B

Let's check each option –
First option: P + R ÷ Q
As per the given information, the family tree will be as follows –

Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. So, P is the father of Q.
Second option: Q ÷ R + P
As per the given information, the family tree will be as follows –

Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. So, P is the niece or nephew of Q.
Third option: P ÷ R – Q
As per the given information, the family tree will be as follows –

Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. So, P is the aunt of Q.
Fourth option: R ÷ P – Q
As per the given information, the family tree will be as follows –

Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. So, P is the mother of Q.

Hence, the third option is correct.