`overset(" CHO")underset(" CHO")("|")overset(NaOH)toX`
The product (X) will be

Options

A. `overset(" CH"_(2)ONa)underset(" COONa")("|")`
B. `overset(" COOH")underset(" COOH")("|")`
C. `overset(" CH"_(2)OH)underset(" COONa")("|")`
D. `overset(" CH"_(2)OH)underset(" CH"_(2)OH)("|")`

Answer

To solve the problem, we need to analyze the reaction involving two aldehyde groups (CHO) in the presence of sodium hydroxide (NaOH). The reaction described is an intramolecular Cannizzaro reaction, which occurs when aldehydes that do not have alpha hydrogens react in the presence of a strong base.

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactants are two aldehyde groups (CHO) connected by a vertical line, indicating they are part of the same molecule.

2. **Determine the Structure**:
The structure can be represented as:
```
CHO
|
CHO
```
This indicates that we have a molecule with two aldehyde groups.

3. **Check for Alpha Hydrogen**:
In the Cannizzaro reaction, aldehydes without alpha hydrogens undergo disproportionation. Since both aldehyde groups (CHO) do not have any alpha hydrogen (hydrogens on the carbon adjacent to the carbonyl), they are eligible for this reaction.

4. **Reaction Mechanism**:
In the presence of NaOH:
- One aldehyde group will be oxidized to a carboxylic acid (COOH).
- The other aldehyde group will be reduced to an alcohol (CH2OH).

5. **Products Formation**:
The products formed from the reaction will be:
- One molecule of carboxylic acid: CHO → COOH (oxidation)
- One molecule of alcohol: CHO → CH2OH (reduction)

6. **Final Product Representation**:
The final products can be summarized as:
- One part of the molecule will be CH2OH (the alcohol).
- The other part will be COONa (the sodium salt of the carboxylic acid).

7. **Conclusion**:
The product (X) will be a combination of these two products. Therefore, the final product can be represented as:
- X = CH2OH and COONa.

### Final Answer:
The product (X) will be CH2OH and COONa.