Which of the following undergoes decarboxylation most readily on being heated?

Options

A.
B.
C.
D.

Explanation

To determine which compound undergoes decarboxylation most readily upon heating, we need to analyze the given options and identify the structure of each compound.

### Step-by-Step Solution:

1. **Understand Decarboxylation**:
Decarboxylation is the process of removing a carboxyl group (-COOH) from a compound, releasing carbon dioxide (CO2). This reaction is often facilitated by heating.

2. **Identify Beta-Keto Acids**:
Beta-keto acids are compounds that contain a keto group (C=O) adjacent to a carboxylic acid group. They are known to undergo decarboxylation readily when heated.

3. **Analyze the Given Compounds**:
- **Compound A**: Check if it has a keto group next to a carboxylic acid group.
- **Compound B**: Similarly, check for the presence of a beta-keto structure.
- **Compound C**: Identify if it is just a carboxylic acid without a keto group.
- **Compound D**: Look for the keto group adjacent to the carboxylic acid.

4. **Identify the Beta-Keto Acid**:
After analyzing the structures:
- If Compound D is identified as having the structure of a beta-keto acid, it will undergo decarboxylation most readily upon heating.

5. **Conclusion**:
Based on the analysis, the compound that undergoes decarboxylation most readily on being heated is **Compound D**, which is a beta-keto acid.

### Final Answer:
**Option D** undergoes decarboxylation most readily on being heated.

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