An organic lactum (A) on acid hydrolysis produces an amino acid (B) which on treatment with `HNO_2` gave compound (C). Compound (C), when heated with conc. `H_3 PO_4` gives a lactone (D). The compound (A) can be synthesised from cyclopentanone with hydroxylamine followed by the treatment with conc. `H_2 SO_4`.
The compound (A) is :

Options

A.
B.
C.
D.

Answer

c

Explanation

Lactum is cyclic amide