Acetic acid smells like:

<b>Correct Option (B):</b> Acetic acid ($\text{CH}_3\text{COOH}$), also known as ethanoic acid, is the primary constituent of vinegar. A $5\text{--}8\%$ solution of acetic acid in water is called vinegar and is widely used as a food preservative, giving it its characteristic pungent smell.<br><br><b>Incorrect Option (A):</b> Bananas owe their sweet, fruity aroma to organic esters (such as isoamyl acetate), not acetic acid.<br><b>Incorrect Option (C):</b> Oranges have a citrusy smell due to limonene and citric acid.<br><b>Incorrect Option (D):</b> Lemons have a sharp citrus smell due to citric acid and citral.