Blood Relations

Concept:We need to identify which expression shows $R$ as a parent of $M$ and $M$ as female.Explanation:Option A: $R \div M + N$ means $R$ is father of $M$ and $M$ is mother of $N$.Thus $M$ is female, and $R$ is parent of $M$, so $M$ is daughter of $R$.Option B: $R + N \div M$ means $R$ is mother of $N$ and $N$ is father of $M$; $R$ is grandmother, not parent.Option C: $R - M \div N$ means $R$ is sister of $M$ and $M$ is father of $N$; $M$ is male, not daughter.Option D: None is incorrect because option A is correct.Answer: