Rahul's mother is the only daughter of Monika's father. How is Monika's husband related to Rahul?

Introduction / Context:

This blood-relation question involves two named individuals, Rahul and Monika, and an important phrase “only daughter of Monika's father”. We must carefully determine who Rahul's mother is and then infer how Monika's husband is related to Rahul. The puzzle is built around a unique daughter, which simplifies the reasoning.

Given Data / Assumptions:

• Rahul's mother is the only daughter of Monika's father.
• We assume Monika is female.
• Monika's father has exactly one daughter.
• Monika has a husband whose relationship to Rahul we need to identify.
• Standard family structure with no step-relations is assumed unless otherwise specified.

Concept / Approach:

We decode “only daughter of Monika's father” first. This expression describes a single specific person in the family: the one and only daughter of Monika's father. We then identify this person as Rahul's mother. From there, understanding Monika's position in the family and the role of her husband allows us to find his relationship to Rahul.

Step-by-Step Solution:

Verification / Alternative check:

We can restate the information as: “Rahul's mother is Monika.” This immediately implies that Monika's husband is Rahul's father. No other common family configuration fits the wording, given the “only daughter” condition. This confirms our conclusion.

Why Other Options Are Wrong:

“Uncle” would place Monika's husband as a brother of one of Rahul's parents, but he is clearly described as the husband of Rahul's mother instead.

“Grandfather” would make Monika's husband one generation above Rahul's parents, which contradicts the fact that he is married to Rahul's mother.

“Brother” would place him in the same generation as Rahul, which is inconsistent with him being a spouse of Rahul's mother.

Common Pitfalls:

Students sometimes overcomplicate the expression “only daughter of Monika's father” and imagine extra siblings, but the word “only” rules that out. Always pay attention to such restrictive words; they often reduce the problem to a single clear possibility.

Final Answer:

Monika's husband is Rahul's father.