Write the structures of the three compounds which have the same molecular formula of `C_(4)H_(8)O` but have different functional groups.

Explanation

To solve the problem of identifying three compounds with the same molecular formula \( C_4H_8O \) but different functional groups, we will follow these steps:

### Step 1: Identify the functional groups
We need to consider different functional groups that can be formed with the molecular formula \( C_4H_8O \). The main functional groups we can consider are:
- Alcohols
- Aldehydes
- Ketones
- Ethers
...