Refer to the below reaction :

Question

A and B are

$\begin{array}{1 1}a)\; Hydroboration\; and\; hydration \;reactions\\b)\; Hydroboration,oxidation, oxymercuration, demercuration.\\c) \; oxymercuration, demercuration , and\; hydration\\d)\; Simple\; hydration \;reaction.\end{array}$