An infrared (IR) spectrum of an organic compound is shown below.

Which compound could have produced this spectrum?
CH3CH2CH2COOH\text{CH}_3\text{CH}_2\text{CH}_2\text{COOH}CH3CH2CH2COOH
HOCH2CH2COCH3\text{HOCH}_2\text{CH}_2\text{COCH}_3HOCH2CH2COCH3
CH3COCH2CH2CH3\text{CH}_3\text{COCH}_2\text{CH}_2\text{CH}_3CH3COCH2CH2CH3
HOCH2CH2CH2CH2OH\text{HOCH}_2\text{CH}_2\text{CH}_2\text{CH}_2\text{OH}HOCH2CH2CH2CH2OH