Which one of the following reactions will yield 2-propanol?

a) $C{H}_2=CH-C{H}_3+H_{2}O \stackrel{H^{+}}{\to }$

b) $C{H}_{2}O \underset{ii)H_{2}O}{\overset{i)C_2{H}_{5}MgI}{\to }}$

c) $C{H}_3-CHO \underset{ii)H_{2}O}{\overset{i)C{H}_{3}MgI}{\to }}$

d) $C{H}_2=CH-C{H}_3 \underset{ii)H_2{O}_2/O{H}^{-}}{\overset{i){\left(B{H}_3\right)}_2}{\to }}$