Identify A and B in the following reaction
`CH_(3)-CH_(3)overset(B)rarrCH_(3)COOHoverset(A)rarrCH_(3)CH_(2)OH`
A. `{:(,A,B),((a),HI+ Red P,LiAlH_(4)):}`
B. `{:(,A,B),((b),Ni//Delta,LiAlH_(4)):}`
C. `{:(,A,B),((c),Pd-BaSO_(4),Zn+HCl):}`
D. `{:(,A,B),((d),LiAlH_(4),HI+RedP):}`
