Correct Answer: P ÷ Q × R

Solution : Let's check the given options –
First option: P ÷ Q × R
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. So, Q is the daughter of P.
Second option: P ÷ Q + R
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. So, Q is the son of P​​​​.
Third option: P × Q ÷ R
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. So, Q is the son of P​​​​.
Fourth option: P + Q ÷ R
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. So, Q is the brother of P​​​​​.

So, only the first option satisfies the relation given in the question. Hence, the first option is correct.