Which of the following amino acid is not optically active ?

Options

A. Glycine
B. Proline
C. Serine
D. Leucine

Explanation

To determine which amino acid is not optically active, we need to understand the concept of chirality in amino acids. Here’s a step-by-step solution:

### Step 1: Understand Chirality
- An amino acid is optically active if it has a chiral carbon atom. A chiral carbon is defined as a carbon atom that is bonded to four different groups or atoms.

### Step 2: Analyze the General Structure of Amino Acids
- The general structure of an amino acid includes:
- A central carbon atom (C)
...