MAH-CET 2026 — Reasoning PYQ

Let us decode the family relationships step-by-step to understand the connection between $P$ and $S$:

Step 1: Analyze the relation between P and Q

• Statement: "P's only sister Q"

• Meaning: $Q$ is a female ($-$ symbol) and she is the sibling of $P$.

  $$\text{Relation 1: }P⟷Q^{(-)}\text{ (Siblings)}$$

Step 2: Analyze the relation involving R

• Statement: "Q's husband R"

• Meaning: $R$ is a male ($+$ symbol) married to $Q$.

  $$\text{Relation 2: }{Q}^{(-)}⟺R^{(+)}\text{ (Spouses)}$$

• Since $R$ is married to $P$'s sister, $R$ is the brother-in-law of $P$.

Step 3: Analyze the relation involving S

• Statement: "R has a brother S"

• Meaning: $S$ is a male ($+$ symbol) and a direct sibling of $R$.

  $$\text{Relation 3: }{R}^{(+)}⟷S^{(+)}\text{ (Siblings)}$$

Conclusion

• $R$ is the brother-in-law of $P$ (sister's husband).

• $S$ is the biological brother of $R$.

• Therefore, the brother of a brother-in-law is also structural to the family as a brother-in-law (specifically, your sister's brother-in-law).

$$\text{Final Relation: }S\text{ is the Brother-in-law of }P$$

Correct Answer

The correct option is (a) Brother-in-law.