Reaction of ethyl formate with excess of $CH_3MgI$ followed by hydrolysis gives

Match List-$I$ with List-$II$.

List-$I$ Reaction	List-$II$ Reagents
$A$. Hoffmann Degradation	$I$. Conc. $KOH, \Delta$
$B$. Clemmensen reduction	$II$. $CHCl_3, NaOH / H_3O^{+}$
$C$. Cannizzaro reaction	$III$. $Br_2, NaOH$
$D$. Reimer-Tiemann reaction	$IV$. $Zn-Hg / HCl$

Consider the following sequence of reactions:
$Benzene$ $\xrightarrow{CO, HCl, \text{anhydrous } AlCl_3/CuCl} A$ $\xrightarrow{B, OH^-, 293 K} \text{Chalcone (1,3-diphenylprop-2-en-1-one)}$
The substance $B$ is:

When acetaldehyde is heated with Fehling solution,a red precipitate is formed. Which of the following is that?

Aldol condensation involving $CH_3-CHO + CH_3-CHO$ gives the product:

The compound obtained by the reduction of propionaldehyde by amalgamated zinc and concentrated $HCl$ is