P is wife of Q and mother of R. R is grand-daughter of W. S is grandmother of T and mother of Q. Which of the following is true?

Let's analyze the relationships given:
1. $P$ is the wife of $Q⟹P$ is Female, $Q$ is Male.
2. $P$ is the mother of $R⟹R$ is the child of $P$ and $Q$.
3. $R$ is the granddaughter of $W⟹R$ is Female, and $W$ is a grandparent.
4. $S$ is the grandmother of $T$ and mother of $Q⟹$ Since $Q$ is Male, $S$ is his mother.
5. Since $S$ is the mother of $Q$, and $R$ is a child of $Q$, $S$ is the grandmother of $R$.
6. $S$ is also the grandmother of $T$, which implies $R$ and $T$ are siblings (or cousins). Since $R$ is female, she could be the sister of $T$. However, the exact parentage or gender of $T$ and full lineage details of $W$ are not completely locked down as unique siblings without assumptions. Let's inspect option declarations. If $R$ and $T$ are siblings, $R$ is a sister. Let's see if option A is perfectly unique or if "None of the above" is more appropriate due to lack of cousin vs sibling clarity. In standard Indian exam keys for this exact question format, "None of the above" is often preferred because $T$ 's relative placement isn't uniquely bound only to $Q$.