Write the structure of 2-hydroxybenzoic acid.
From the name itself, we get to know that the parent chain consist a benzene ring and a carboxylic acid group is attached to it.
The carbon atom containing the –COOH group is numbered as the first and the carbon atom adjacent to it (which is the 2nd) has the –OH group.
In this way, we get 2-hydroxybenzoic acid. It looks like:

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