In a set of reactions propionic acid yielded a compound `D`
`CH_(3)CH_(2)COOHoverset(SOCI_(2))rarrBoverset(NH_(3))rarrCunderset(Br_(2))overset(KOH)rarrD` The structure of `D` would be .
A. `CH_(3)CH_(2)NH_(2)`
B. `CH_(3)CH_(2)CH_(2)NH_(2)`
C. `CH_(3)CH_(2)CONH_(2)`
D. `CH_(3)CH_(2)NHCH_(3).`