Correct Answer - D
Fructose is non-electrolyte, while ammonia ans acetic acid are weak electrolytes. On the other hand, hydrochloric acid `(HCl)` is a strong electrolyte i.e., it ionizes almost sompletely into `H^(+)` and `Cl^(-)` ions. Thus, aqueous solution of `HCl` is the best conductor of electric current.
