Functional group –CHO is present in which of the following?

Correct option is B

The correct answer is (b) Aldehyde.
Aldehyde: The functional group –CHO, known as the aldehyde group, is characterized by a carbonyl center (a carbon double-bonded to oxygen) bonded to a hydrogen atom and an R group (which can be a hydrogen atom or any hydrocarbon group). This functional group is found in compounds known as aldehydes.
· The general formula for an aldehyde is R–CHO, where R represents a hydrocarbon group or hydrogen.
· Examples of aldehydes include for
Additional Information:
· Ketone : Ketones contain a carbonyl group (C=O) bonded to two hydrocarbon groups (R1–CO–R2). 
· Alcohol : Alcohols contain a hydroxyl group (–OH) attached to a carbon atom. 
· Carboxylic acid : Carboxylic acids contain a carboxyl group (–COOH), which includes a carbonyl group (C=O) and a hydroxyl group (–OH).