The correct option is B Lemon
Lemon tastes sour therefore is acidic in nature.
Cleaning agents such as soaps, detergents and shampoos contain sodium hydroxide. Sodium hydroxide is a base and it gives them a bitter taste and slippery touch.
Toothpaste contains sodium carbonate which is basic in nature.
Baking soda, also known as bicarbonate of soda or sodium bicarbonate is also basic in nature.