23.Give the best description of the regioselectivity and stereospecificity in theoxymercuration of an alkene.A.Markovnikov orientation with syn-additionB.Markovnikov orientation with anti-additionC.anti-Markovnikov orientation with syn-additionD.anti-Markovnikov orientation with anti-additionE.Markovnikov orientation with both syn-and anti-addition24.What synthetic goal is achieved by subjecting an alkene to anoxymercuration-demercuration reaction sequence?
