Answer : The correct option is, (A) Aldehyde
Explanation :
Alcohol group : It is the class of organic compound in which the hydroxy (-OH) group is attached to a hydrocarbon is known as alcohols.
The general representation of alcohol are, [tex]R-OH[/tex].
For example : [tex]CH_3-CH_2-OH[/tex] is obtained when one hydrogen atom is replaced by [tex]-OH[/tex] group.
Amino acid : Amino acid are the acid that contains two functional groups which are carboxylic group, [tex]-COOH[/tex] and ammine group, [tex]-NH_2[/tex].
The bond present between the two amino acid is a peptide bond. The peptide bond is formed between the nitrogen of one amino acid and carbon of another amino acid.
Ester group : It is the class of organic compound in which the [tex]-COO[/tex] group is attached to a hydrocarbon is known as ester.
The general formula of ester are, [tex]R-COO-R^'[/tex]. It is directly attached to the two alkyl group of carbon.
Aldehyde group : It is the class of organic compound in which the (-CHO) group is attached to a hydrocarbon is known as aldehyde.
The general representation of aldehyde are, [tex]R-CHO[/tex].
For example : [tex]CH_3-CH_2-CHO[/tex] is obtained when one hydrogen atom is replaced by [tex]-CHO[/tex] group.
Hence, the correct option is, (A) Aldehyde
