Step 1: Understanding the Concept:
Common names of many carboxylic acids come from their natural sources.
Step 2: Detailed Explanation:
\(\text{HCOOH}\) was first isolated from red ants, and Latin for ant is formica. So it is formic acid. Its IUPAC name is methanoic acid.
Acetic acid is \(\text{CH}_3\text{COOH}\), propanoic acid is \(\text{C}_2\text{H}_5\text{COOH}\), and butanoic acid is \(\text{C}_3\text{H}_7\text{COOH}\).
Step 3: Final Answer:
Formic acid, option (B).
Final Answer:
HCOOH is formic acid (methanoic acid).
\[ \boxed{\text{(B) }\text{Formic acid}} \]