See image — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

# Solution **Analyzing the Stereochemical Relationships:** **Structure A → Structure B (swap $Br$ and $CH_3$):** - Exchanging two groups at a chiral center inverts stereochemistry - A and B are **enantiomers** (opposite configurations) **Structure A → Structure C (swap $C_2H_5$ and $Cl$):** - Exchanging two different groups at the same chiral center also inverts stereochemistry - A and C are **enantiomers** (opposite configurations) **Relationship between B and C:** - If A is the original configuration - B is the inversion of A (opposite stereochemistry) - C is also the inversion of A (opposite stereochemistry) - Therefore, B and C have the **same stereochemistry** → they are **identical structures** **Evaluating Each Statement:** | Statement | Verdict | |-----------|---------| | (A) B and C are identical | ✓ **Correct** | | (B) A and C are enantiomers | ✓ **Correct** | | (C) B and C are enantiomers | ✗ **Incorrect** — they're identical, not enantiomers | | (D) A and B are enantiomers | ✓ **Correct** | **Answer: Option C is NOT correct** because B and C are identical compounds (same stereochemistry), not enantiomers.