Dr Sadao and Hana knew that their decision to save the enemy soldier would be questioned by everyone. However, they firmly followed their sense of duty. For Dr Sadao this sense of duty came from the profession he was in; but for Hana, the duty was purely humanitarian. From bearing the defiance from her domestic staff to being forced to do all the chores of house-hold herself, she does all with grace and dignity. Hana’s loving, considerate and sympathetic nature shines out. She washed and fed the soldier although it was not her job. Her care helped recuperate the soldier fast. It is also apparent from the story that she respected her husband, and as a sense of duty towards him, did the needful. This explains why she, even after feeling sick, comes back to the room and readily does whatever is told by her husband during the operation.
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.