Yes, the carousing at the wedding hall was illusionary. Dr Margolin met with an accident on the way to the wedding hall and was the victim of the accident. Raizel, who the Nazis shot, was dead for a long time now, and Dr Margolin could see her because of his death. His astral body was hovering in the twilight world. Both were missing their physical appearance, and in fact, were in spiritual forms.
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.