Identify compounds A,B and C in the following sequence of reactions.
`CH_3CH_2Ioverset(NaCN)(to)A underset(" Partial hydrolysis ")overset(OH^-)(to)B overset(NaOH+Br_2)(to)C`

Explanation

`{:(CH_3CH_2Ioverset(NaCN)(to)CH_3CH_2CN),(" Iodoethane(Ethyl lodide) Ethyl Cyanide (A) "):}`
`{:(CH_3CH_2CN underset(" partial hydrolysis ")overset(OH^-)(to)CH_3CH_2CONH_2),(" Ethyl cyanide (B)Propanamide "):}`
`{:(CH_3CH_2CONH_2 underset(NaOH)overset(Br_2)(to)CH_3CH_2NH_2+CO_2),(" (B)Propanamide (C)Ethyl amine "):}`
The above reaction is Hofmann's reaction.