Lactic acid on oxidation with Fenton's reagent gives:

Options

A. a.`CH_(3)COCOOH (Pyruvic acid)`
B. b.`CH_(3)COOH`
C. c.`HOOC-underset(O)underset(||)(C )-COOH`
D. d.`HOOC-COOH`

Explanation

To solve the question regarding the oxidation of lactic acid with Fenton's reagent, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactant in this case is lactic acid, which has the chemical formula CH₃CHOHCOOH.

2. **Understand Fenton's Reagent**:
- Fenton's reagent is a combination of ferrous ions (Fe²⁺) and hydrogen peroxide (H₂O₂). It is commonly used as an oxidizing agent.

3. **Write the Oxidation Reaction**:
- When lactic acid is oxidized by Fenton's reagent, it undergoes a reaction where hydrogen atoms are removed. The oxidation process involves the removal of two hydrogen atoms from lactic acid.

4. **Determine the Product**:
- The product formed from the oxidation of lactic acid is pyruvic acid. The chemical structure of pyruvic acid is CH₃C(=O)COOH.
- The oxidation can be summarized as:
\[ \text{CH}_3\text{CHOHCOOH} \xrightarrow{\text{Fenton's Reagent}} \text{CH}_3\text{C(=O)COOH} + \text{H}_2\text{O} \]

5. **Final Answer**:
- Therefore, the product of the oxidation of lactic acid with Fenton's reagent is pyruvic acid (CH₃COCOOH).

### Conclusion:
- The answer to the question "Lactic acid on oxidation with Fenton's reagent gives" is **pyruvic acid (CH₃COCOOH)**.