Behold the Structure of Vanillin, Which Is the Main Ingredient

Multiple Choice

Behold the structure of vanillin, which is the main ingredient in vanilla extract.
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The functional groups in vanillin are best described as

A) a ketone, a phenol, and an ether.
B) an alcohol, an aldehyde, and an ether.
C) a ketone, an alcohol, and an ether.
D) a phenol, an aldehyde, and an ether.
E) an aldehyde, a phenol, and an alcohol.