Correct Answer: Pyridine

Solution : The correct option is Pyridine.

These denaturants are frequently added to ethanol to make it unfit for human consumption in order to discourage people from drinking it as an alcoholic beverage. Denaturants applied typically include Pyridine is a chemical molecule with a strong, unpleasant odour and a bitter taste that acts as a deterrent to persons consuming denatured alcohol. Other denaturants are Methanol (methyl alcohol): Methanol is harmful to humans and, if consumed, can cause blindness or even death. It is one of the most often used denaturants in ethanol. Isopropanol (isopropyl alcohol): Another harmful chemical added to denatured ethanol to prevent intake is isopropanol. It is often used in home items such as rubbing alcohol.