What is IUPAC name of the following compound?

What is IUPAC name of the following compound?

1. 3-Carboxy-5-ethylphenol
2. 5-Carboxy-3-ethylphenol
3. 3-Ethyl-5-hydroxybenzoic acid
4. 5-Ethyl-3-hydroxybenzoic acid

Asked in: MHT CET 2024 (10 May Shift 2)

Practice more Basic Principles of Organic Chemistry questions on Aicharya