An organic compound A on acid hydolysis produces B, an amino acid. B on treatement with `HNO_(2)` gives C. C on heating with conc. `H_(2)SO_(4)` produces a lactone D. A can also be synthesised by the reaction of cyclopentanone with `H_(2)N - OH` followed by treatement of conc. `H_(2)SO_(4)`
What is the structure of compound A?
A.
B.
C.
D.
