A and B in the following reactions are

Options

A. A=
B. , B=`NH_3`
C. , `B=H_3O^(o+)`
D. `A=R R' CH_2CN, B=NaOH`

Answer

A

Explanation

`R-CO-R. overset(HCN)to underset("Cyanohydrin")underset((A))(R-underset(CN)underset(|)overset(OH)overset(|)C-R.) overset(LiAlH_4)to R-underset(R.)underset(|)overset(OH)overset(|)C-CH_2NH_2`