Why is `(+-)-`butan-2-ol optically inactive ?

Explanation

To understand why (±)-butan-2-ol is optically inactive, we can break down the explanation into clear steps:

### Step 1: Identify the Structure of Butan-2-ol
Butan-2-ol has the following structure:
- It is a four-carbon alcohol with the hydroxyl (-OH) group attached to the second carbon.
- The structure can be represented as:
\[
CH_3-CH(OH)-CH_2-CH_3
...