Name the functional groups present in the following compounds.
(a) `CH_(3)COCH_(2)CH_(2)CH_(2)CH_(3)` , (b) `CH_(3)CH_(2)CH_(2)COOH`
(c ) `CH_(3)CH_(2)CH_(2)CH_(2)CHO` , (d) `CH_(3)CH_(2)OH`

Explanation

To identify the functional groups present in the given compounds, we will analyze each compound step by step.

### Step 1: Analyze Compound (a) `CH₃COCH₂CH₂CH₂CH₃`
1. **Identify the structure**: The compound can be broken down as follows:
- `CH₃` (methyl group)
- `CO` (carbonyl group, which is part of a ketone)
- `CH₂CH₂CH₂CH₃` (a straight chain of carbon atoms)

...