Nitriles can be converted to 1° amines by reaction with
LiAlH4.
Mechanism (i) Hydride nucleophile attacks the electrophilic carbon in nitrile to form imine anion.
(ii) Hydrolysis of amine derivative.
2-hydroxy-2-methyl propionitrile on acidic hydrolysis gives
2-hydroxy-2-methylpropionic acid.
Mechanism
The last step of dehydration takes place in presence of
H2SO4 to form 2-methylacrylic acid.
2-methylacrylic acid is the product (B).
Hence, correct answer is (c).