The product $(C)$ of the following reaction is:

Consider the following molecules and statements related to them:
$(a)$ $(B)$ is more likely to be crystalline than $(A)$
$(b)$ $(B)$ has a higher boiling point than $(A)$
$(c)$ $(B)$ dissolves more readily than $(A)$ in water.
Identify the correct option from below:

The major product formed in the following reaction is
$C_6H_5CH=CH_2$ $\xrightarrow[(ii) H_3O^+]{(i) KMnO_4, KOH, \Delta}$ $\xrightarrow{(iii) Br_2/FeBr_3} \text{Product}$

The acid which reduces Fehling solution is

Which of the following acids has the highest $pK_{a}$ value?

$R-CH_2-COOH \xrightarrow[(ii) H_2O]{(i) Cl_2 / \text{Red phosphorus}} R-CH(Cl)-COOH$
The above reaction is known as