At the wedding, the author uses the conversation technique between the guests to portray the gruesome realities of the war. At the party, Dr Margolin and other people are conversing with each other about the deaths in their family and the destruction of their community. Through this, the author conveys the talks of the realities of the war among people in a conversational tone, which makes it sound realistic and believable to the readers.
A compound (A) with molecular formula $C_4H_9I$ which is a primary alkyl halide, reacts with alcoholic KOH to give compound (B). Compound (B) reacts with HI to give (C) which is an isomer of (A). When (A) reacts with Na metal in the presence of dry ether, it gives a compound (D), C8H18, which is different from the compound formed when n-butyl iodide reacts with sodium. Write the structures of A, (B), (C) and (D) when (A) reacts with alcoholic KOH.