Phenol is also known as

Options

A. Phenolic acid
B. Hydroxy cinnamic acid
C. Carbolic acid
D. Hydroxy carbolic acid

Answer

To determine what phenol is also known as, let's analyze the options provided:

1. **Phenolic Acid**: This term refers to a compound where a carboxylic acid group (-COOH) is attached to a benzene ring along with a hydroxyl group (-OH). This is not the same as phenol, which only has the hydroxyl group.

2. **Hydroxycinnamic Acid**: This compound contains a hydroxyl group and a carboxylic acid group, but it is derived from cinnamic acid, which is not phenol. Therefore, this is not correct.

3. **Carboxylic Acid**: This is a broad category of compounds that have a carboxyl group (-COOH). Phenol does not fall under this category as it only has a hydroxyl group attached to the benzene ring.

4. **Hydroxycarboxylic Acid**: This term refers to acids that contain both a hydroxyl group and a carboxylic acid group. Phenol does not fit this definition either.

After evaluating all the options, we can conclude that none of the options provided accurately describe phenol.

However, if we were to look for a common name for phenol, it is simply known as "phenol" or "carbolic acid" in some contexts.

### Final Answer:
Phenol is commonly known as "carbolic acid".