Which one of the following is a basic amino acid

Options

A. `NH_(2) - overset(COOH)overset(|)underset(CH(CH_(3))_(2))underset(|)C-H`
B. `NH_(2) - overset(COOH)overset(|)underset((CH_(2))_(4)NH_(2))underset(|)C-H`
C. `NH_(2)- overset(COOH)overset(|)underset(CH_(2)OH)underset(|)C-H`
D. `NH_(2) - overset(COOH)overset(|)underset(CH_(3))underset(|)C-H`

Answer

B

Explanation

Basic amino acid has two amino groups and one carboxyl group per molecule. This is lysine a basic amino acid.