The main reactants involved in the Etard reaction are:

Consider the following statements. Acetophenone can be prepared by:
$1$. Oxidation of $1$-phenylethanol
$2$. Reaction of benzaldehyde with methyl magnesium bromide
$3$. Friedel-Crafts reaction of benzene with acetyl chloride
$4$. Distillation of calcium benzoate

In the reaction $CH_3CN + CH_3MgI \to A \xrightarrow{H_2O/H^{+}} B$,the compound $B$ is

The molecular formula of the final product of the following synthetic scheme is:

Which of the following reactions will give benzophenone as the major product?
$(A)$ Benzoyl chloride $+$ Benzene $+ AlCl_3$ (anhydrous)
$(B)$ Benzoyl chloride $+$ Phenylmagnesium bromide (excess)
$(C)$ Benzoyl chloride $+$ Diphenyl cadmium

An organic compound $X$ gives a red precipitate on heating with Fehling's solution. Which one of the following reactions yields $X$ as a major product?