Which of the following reactions yields a cis -diol as the major product?

Step-by-step solution

To determine which reaction yields a cis -diol, we need to analyze the stereochemistry of the addition reactions for each given reagent: 1. Reagents and their stereochemical outcomes: - KMnO ₄ / OH ⁻ (cold, dilute) performs syn -hydroxylation. - H ₂ O ₂ / HCOOH generates performic acid in situ, which forms an epoxide that is subsequently opened by water, resulting in anti -hydroxylation. - OsO ₄ followed by Na ₂ SO ₃ performs syn -hydroxylation. 2. Analyzing the options: - Option (A): The reactant is an acyclic cis