The correct answer is: A. Sodium salts of fatty acids.
Detergents are anionic surfactants, which means they have a negatively charged end and a positively charged end. The negatively charged end of the detergent molecule is attracted to water, while the positively charged end is attracted to oil and grease. This allows detergents to break down and remove dirt and grime from surfaces.
Sodium salts of fatty acids are the most common type of detergent. They are made by reacting sodium hydroxide (lye) with fatty acids, which are found in animal and vegetable oils. Sodium salts of fatty acids are effective at removing dirt and grease, and they are
also relatively inexpensive.Sodium salts of sulphonic acids are another
type of detergent. They are made by reacting sodium hydroxide with sulphonic acids, which are organic acids that contain sulfur. Sodium salts of sulphonic acids are more effective at removing oil and grease than sodium salts of fatty acids, but they are also more expensive.Sodium salt of benzoic acid is a type of preservative that is used to prevent the growth of mold and bacteria. It is not a detergent.
In conclusion, the correct answer is: A. Sodium salts of fatty acids.