A. Formic acid
B. Acetic acid
C. Propionic acid
D. Butyric acid
Answer: Butyric acid
A. Formic acid
B. Acetic acid
C. Propionic acid
D. Butyric acid
Answer: Butyric acid
Additional Information: Butanoic acid is commonly known as butyric acid, which is found in butter and has a rancid smell.