Consider the following sequence of reactions
`(CH_(3))_(2)CHCOOHunderset(2(CH_(3))_(2)NH)overset(1PCI_(5))rarrA underset(2.H_(3)O^(+))overset(1.LiAIH_(4))rarr`
The final product `B` is .
A. `(CH_(3))_(2)CHCH_(2)N(CH_(3))_(2)`
B. `(CH_(3))CHN(CH_(3))_(2)`
C. `(CH_(3))_(2)CHunderset(O)underset(||)CN(CH_(3))_(2)`
(2)
D. `(CH_(3))_(2)CHunderset(OH)underset(|)CN(CH_(3))_(2)`
(2)
