See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

CH C CH3 CH3 2 Sia B H,THF   CH BSia2 HC CH3 CH3 2 2 H O , OH Q     3 2 Hg OAc THF CH OH    CH OCH3 C CH3 HgOAc CH3 4 NaBH /OH  CH OCH3 HC CH3 CH3