IGDTUW 2025 — Reasoning PYQ

To solve this, let's map out the family tree based on the provided clues:

1. "R is the mother of P who is the father of T": This gives us the generation chain: $R\to P\to T$.

   • Since $R$ is $P$'s mother, and there are two married couples, $R$ must be married to someone. Let's assume $R$ is married to $Q$ (since $Q$ is involved in the generation of $S$).

2. "S is the grandson of Q": This means $S$ is in the third generation. Since $P$ is the father of $T$, and $S$ is a grandson, $S$ must be a child of $P$ or $P$'s sibling.

3. Family Structure:

   • Generation 1: $Q$ (Grandfather) and $R$ (Grandmother) - First Couple.

   • Generation 2: $P$ (Father) is married to someone ($U$ is the only remaining person) - Second Couple.

   • Generation 3: $S$ and $T$ are the children of $P$ and $U$.

Given that $P$ is the father of both $T$ and $S$ (as $S$ is the grandson of $Q$ and $R$ and $T$ is the child of $P$), $T$ and $S$ are siblings. Since the gender of $T$ is not explicitly specified as male or female in the prompt, $T$ could be the brother or the sister of $S$.

Therefore, the relationship is Brother or Sister.

The correct option is (c) Brother or Sister.