An organic compound 'A', containing C,H,N and O, on analysis gives 49.32% carbon 9.59%, hydrogen and 19.18% nitrogen. 'A' on boiling with NaOH gives off NH_(3) and a salt which on acidification gives a monobasic nitrogen free acid, 'B'. The silver salt of 'B' contains 59.67% silver. Structure of 'A' and 'B' are respectively:

An organic compound 'A', containing C,H,N and O, on analysis gives 49.

1.	An organic compound 'A', containing C,H,N and O, on analysis gives 49.32% carbon 9.59%, hydrogen and 19.18% nitrogen. 'A' on boiling with NaOH gives off NH_(3) and a salt which on acidification gives a monobasic nitrogen free acid, 'B'. The silver salt of 'B' contains 59.67% silver. Structure of 'A' and 'B' are respectively:
Answer» `CH_(3)CH_(2)COOH, CH_(3)CH_(2)CONH_(2)` `CH_(3)CONHCH_(3),CH_(3)COOH` `CH_(3)CH_(2)CONH_(2),CH_(3)CH_(2)COOH` `CH_(3)CH_(2)CH_(2)NH_(2),CH_(3)CH_(2)COOCH_(3)` Answer :C