Given the total number of isomers, including stereoisomers, obtained on monochlorination of isopentane.

Explanation

To determine the total number of isomers, including stereoisomers, obtained from the monochlorination of isopentane, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of Isopentane**:
- Isopentane, also known as 2-methylbutane, has the following structure:
```
CH3
...