Explanation:
Addition of the adulterants reduces the value of nutrients in food and also contaminates the food, which is not fit for consumption. The adulterants can be available in all food products which we consume daily, including dairy products, cereals, pulses, grains, meat, vegetables, fruits, oils, beverages, etc. The process of contaminating food or adding to the food components is a common phenomenon in developing countries.Hence, the correct option is (C).