The product $(P)$ of the given reaction is:

The products $A$ and $B$ in the following reaction sequence are:

Draw the structures of the following compounds:
$(i)$ $3-$Methylbutanal
$(ii)$ $p-$Nitropropiophenone
$(iii)$ $p-$Methylbenzaldehyde
$(iv)$ $4-$Methylpent$-3-$en$-2-$one
$(v)$ $4-$Chloropentan$-2-$one
$(vi)$ $3-$Bromo$-4-$phenylpentanoic acid
$(vii)$ $p, p^{\prime}-$Dihydroxybenzophenone
$(viii)$ Hex$-2-$en$-4-$ynoic acid

Match the compounds given in Column-$I$ with their names in Column-$II$.

Column-$I$ (Formula)	Column-$II$ (Name)
$(A)$ $CH_3-CH=CHCHO$	$(i)$ $1,3$-diphenylprop-$2$-en-$1$-one
$(B)$ $CH_3-C(CH_3)=CH-COCH_3$	(ii) Acetophenone-$2,4$-dinitrophenylhydrazone
$(C)$ $C_6H_5-CH=CH-COC_6H_5$	(iii) But-$2$-enal
$(D)$ $C_6H_5-C(CH_3)=N-NH-C_6H_3(NO_2)_2$	(iv) $4$-methylpent-$3$-en-$2$-one

$(i) \ F_3CCOOH$
$(ii) \ CH_3COOH$
$(iii) \ C_6H_5COOH$
$(iv) \ CH_3CH_2COOH$
Correct order of $pK_a$ value is:

The major product in the following reaction is