Which of the following react with `NaHSO_3`

Options

A. `CH_3COCH_3`
B. `CH_3CHO`
C. HCHO
D. All of these

Explanation

To determine which compounds react with sodium bisulfite (NaHSO3), we need to focus on the types of compounds that are known to react with NaHSO3. Sodium bisulfite is known to react with carbonyl compounds, specifically aldehydes and ketones, to form bisulfite adducts, which typically precipitate out as a white solid.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- Sodium bisulfite (NaHSO3) is the reagent in question.
- We need to identify which of the given options are aldehydes or ketones.

2. **Understand the Reactivity**:
- Aldehydes and ketones contain a carbonyl group (C=O) that can react with NaHSO3.
- The reaction results in the formation of a bisulfite adduct, which is a white precipitate.

3. **Consider the Options**:
- If the options provided include aldehydes and/or ketones, they will react with NaHSO3.
- If any of the options are not aldehydes or ketones (like alcohols, carboxylic acids, etc.), they will not react.

4. **Conclusion**:
- If all the options provided are aldehydes or ketones, they will all react with NaHSO3, resulting in the formation of a white precipitate.
- Therefore, if the question states "Which of the following react with NaHSO3?" and includes aldehydes and ketones, the answer would be that all of them react.

### Final Answer:
All of the given options (if they are aldehydes or ketones) will react with NaHSO3 to form a white precipitate.