Write any three method of preparation of chlorobenzene. How does it react with?

a. Chloral and

b. Methyl chloride in the presence of sodium metal and dry ether.

An aromatic compound (A) undergoes Sandmeyer's reaction to give (B). The compound (B) is reduced with Ni-Al in presence of alkali to give Compound (C). The compound (C) further reacts with CH₃Cl in the presence of Anhydrous AlCl₃. The compound (B) when heated with chloral in acidic medium gives a common insecticide. Identify (A), (B), (C) and (D) giving complete reaction.

Give two chemical reactions for the preparation of chlorobenzene. Why does it give ortho and para products during electrophilic substitution reaction? Give its action on chloral.