Correct statement by changing underline part of sentence
An acid `ul("shows")` the reactions of carbonyl group also.

Explanation

To correct the statement "An acid shows the reactions of carbonyl group also," we need to change the underlined part of the sentence.

### Step-by-Step Solution:

1. **Identify the Incorrect Part**: The underlined part "shows" implies that acids can exhibit the same reactions as carbonyl groups (aldehydes and ketones). This is not accurate.

2. **Understanding the Properties**: Acids and carbonyl compounds have different chemical properties. For instance, carbonyl compounds can undergo nucleophilic addition reactions, while acids primarily participate in acid-base reactions.

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