The correct answer is D. fats.
Soap is a salt of a fatty acid. It is made by mixing a fat or oil with an alkali, such as sodium hydroxide or potassium hydroxide. The mixture is heated until it forms a soapy liquid. The soap is then separated from the glycerine and water, and it is ready to be used.
Alcohol is a flammable liquid that is used in many different products, such as cleaning products, fuel, and solvents. It is not used to make soap.
Kerosene oil is a type of oil that is used in lamps and heaters. It is not used to make soap.
Glycerine is a sweet, colorless liquid that is used in many different products, such as cosmetics, soaps, and lotions. It is a byproduct of the soap-making process.
Fats are a type of lipid that is found in animal and plant tissues. They are made up of fatty acids, which are long chains of carbon and hydrogen atoms. When fats are mixed with an alkali, the fatty acids react with the alkali to form soap.