Step 1: Concept
Blood Relation mapping.
Step 2: Meaning
Analyze the generation links between Amit, Bobby, and Chitransha.
Step 3: Analysis
- Amit and Bobby are brothers (Same generation).
- Amit's son is Dolly's brother; since Chitransha and Dolly are sisters, Amit's son is also Chitransha's brother.
- This means Amit is the father of Chitransha.
- The brother of one's father is an Uncle.
Step 4: Conclusion
Hence, Bobby is the uncle of Chitransha.
Final Answer:(B)