Name the following carboxylicacid:-OHA. butanoic acidC. propanoic acidB. butanolD. propanal

Answer
A. butanoic acid
Explanation
The given structure has 4 carbon chain. The carboxylic acid will have a name similar to that butane in alkane with the e replaced with oic.
Hence, the name of the carboxylic acid is butanoic acid.