Identify the major product formed in the following reaction sequence

Arrange the following in increasing order of their reactivity for nucleophilic addition reaction.

(A)

(B)

(C)

(D)

Identify (Z) in the following reaction.

$$\mathrm{C{H_3}COOH\buildrel {LiAl{H_4}} \over \longrightarrow (X)\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{573\,K}^{Cu}} (Y)\buildrel {dil.\,NaOH} \over \longrightarrow (Z)}$$

The total number of products formed in the following reaction sequence is

$$\begin{gathered}\mathrm{CH}_3 \mathrm{COCl} \stackrel{\text { (i) }\left(\mathrm{CH}_3\right)_3 \mathrm{Cd}}{\longrightarrow}(P) \\ (P)+\mathrm{CH}_3 \mathrm{CHO} \stackrel{\text { (ii) } \mathrm{NaOH}(a q), \Delta}{\longrightarrow} \text { ? }\end{gathered}$$