Which answer best describes the function of fatty acids?

Fatty acids are the building blocks of fat in the body and food. They are organic acids, carbon chains with at least one carboxyl group (COOH).
Fatty acids are essential in order the human body to function normally. These fatty acids are called Essential Fatty Acids and are  involved in the process of building healthy cells, maintaining brain and nerve function.

The correct answer will be option-B (Semi-synthetic)

Explanation:

Chemical drugs can be synthesized through many ways on the basis of which they can be categorized:

1. Natural Drug: The drug prepared from the natural extracts.

2. Synthetic Drug: The drug is synthesized by chemical reactions.

3. Semi-synthetic Drug: The drug which is neither completely natural nor synthetic that is they are prepared from the natural extracts by modifying them.

Since in the given question, the drug was prepared by the converting side chain to the hydroxyl group of the antimicrobial drug therefore it is considered as the semi-synthetic drug and Option-B is the correct answer.