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(B) The given reaction involves the treatment of a $\beta$-hydroxy aldehyde with Clemmensen reduction conditions $(Zn(Hg)/HCl, \Delta)$. $1$. Under th

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$C_6H_5-CH=C(CH_3)-C_2H_5$

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(B) The given reaction involves the treatment of a $\beta$-hydroxy aldehyde with Clemmensen reduction conditions $(Zn(Hg)/HCl, \Delta)$. $1$. Under these acidic conditions,the aldehyde group $(-CHO)$ is reduced to a methyl group $(-CH_3)$. $2$. Simultaneously,the $\beta$-hydroxy group $(-OH)$ undergoes dehydration due to the acidic medium and heat,leading to the formation of a stable conjugated alkene. $3$. The reaction proceeds through the reduction of the aldehyde to a hydrocarbon chain,followed by the elimination of water to form the most stable alkene,which is $C_6H_5-CH=C(CH_3)-C_2H_5$.

List-$I$	List-$II$
$A$. Tollen's reagent	$I$. Para-rosaniline + $SO_2$
$B$. Schiff's reagent	$II$. Rochelle salt + $aq. NaOH$
$C$. Rosenmund reduction	$III$. Ammoniacal silver nitrate
$D$. Fehling solution $B$	$IV$. $Pd + BaSO_4$

The major product formed in the following reaction is:

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