Neha is the only daughter of her father, and her father is the father-in-law of Pranav's brother. Pranav is Rajeev's nephew. In this family relation question, how is Rajeev related to Neha?

Introduction / Context:
This blood relation puzzle mixes daughter, father-in-law, nephew and uncle relationships. You must track how Neha, Pranav, Pranav's brother and Rajeev are connected. The question is typical of exam problems where you need to parse layered phrases like father-in-law of Pranav's brother and then tie them back to see how two people are related, in this case Rajeev and Neha.

Given Data / Assumptions:
• Neha is the only daughter (only girl child) of her father.• Neha's father is the father-in-law of Pranav's brother.• Pranav is Rajeev's nephew.• Father-in-law means father of one's spouse.• There is no mention of multiple marriages; we assume a standard monogamous family structure.

Concept / Approach:
If Neha's father is the father-in-law of Pranav's brother, then Pranav's brother must be married to Neha (because Neha is the only daughter of that father). So Neha is the wife of Pranav's brother. This makes Neha the sister-in-law of Pranav. We are also told that Pranav is Rajeev's nephew, which means Rajeev is the brother (or sister) of one of Pranav's parents, typically treated as an uncle. That same uncle is also an uncle of Pranav's brother, and by marriage he becomes an uncle-in-law to Neha. In competitive exams, such an uncle-in-law is usually simply referred to as an uncle relative to Neha.

Step-by-Step Solution:
Step 1: Let N be Neha's father. Neha is his only daughter.Step 2: N is father-in-law of Pranav's brother, so Pranav's brother is married to N's child.Step 3: Because N has only one daughter, that child must be Neha. Thus, Neha is married to Pranav's brother.Step 4: If Pranav is Rajeev's nephew, then Rajeev is an uncle of Pranav (brother of Pranav's father or mother).Step 5: Pranav's brother shares the same parents as Pranav, so Rajeev is also an uncle of Pranav's brother.Step 6: Neha is married to Pranav's brother, so Rajeev is Neha's uncle-in-law.Step 7: In exam-style blood relation questions, such an uncle by marriage is customarily referred to simply as an uncle.

Verification / Alternative check:
Draw a family tree. Start with parents of Pranav and his brother. Rajeev is a sibling of one of these parents, making him an uncle of both boys. Neha's father is also the father-in-law of Pranav's brother, so his daughter Neha marries that brother. Once Neha marries into this family, Rajeev becomes a senior male relative one generation above her, linked through her husband. This matches the role of an uncle in typical reasoning terminology. There is no indication that Rajeev is her father-in-law, because Rajeev is not described as father of her husband; he is uncle of her husband instead.

Why Other Options Are Wrong:
Father-in-law: This would require Rajeev to be the father of Neha's husband, which contradicts him being uncle of Pranav.Daughter-in-law: This describes Neha's relation to someone else, not Rajeev's relation to her.Brother: Brother would mean Neha and Rajeev share the same parents, not supported here.Cousin: Cousins are in the same generation and share grandparents, not uncle nephew links.

Common Pitfalls:
A common mistake is mixing up father-in-law relationships and assuming that Neha's father must be Rajeev, leading to wrong answers like daughter-in-law. Another is failing to realise Neha is married to Pranav's brother because she is the only daughter of the father-in-law mentioned. Keeping track of generations and who is married to whom makes it clear that Rajeev is most appropriately described as Neha's uncle.

Final Answer:
Rajeev is related to Neha as an uncle.