Assertion: Acetamide has more polar`gt C = 0` group than ethyl acetoacetate.
Reason : `ddot NH_(2)` is more electron donating than `OC_(2)H_(5)`

Options

A. a. If both assertion and reason are true and reason is the correct explanation of assertion
B. b. If both assertion and reason are true but reason is not the correct explanation of assertion
C. c. If assertion is true but reason is false
D. d. If both assertion and reason are false.

Explanation

To solve the question, we need to analyze the assertion and reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that acetamide has a more polar C=O (carbonyl) group than ethyl acetoacetate.
- Acetamide has the structure:
\[ \text{CH}_3\text{C(=O)NH}_2 \]
- Ethyl acetoacetate has the structure:
\[ \text{CH}_3\text{C(=O)CH}_2\text{COOC}_2\text{H}_5 \]

2. **Analyzing the Carbonyl Group**:
- The polarity of a carbonyl group is influenced by the substituents attached to it. The more electron-donating groups attached to the carbonyl carbon, the more polarized the C=O bond becomes.
- In acetamide, the NH2 group is attached to the carbonyl carbon.
- In ethyl acetoacetate, the carbonyl carbon is attached to an ethyl group (OCH2COOC2H5).

3. **Understanding the Reason**:
- The reason states that NH2 is more electron-donating than OCH2CH5.
- To assess this, we need to consider the electronegativity of nitrogen and oxygen.
- Nitrogen (N) has a lower electronegativity (around 3.0) compared to oxygen (O) (around 3.5). This means that nitrogen can donate its lone pair of electrons more effectively than oxygen.

4. **Comparing Electron Donation**:
- The lone pair on nitrogen in NH2 can be donated to the carbonyl carbon, increasing the polarity of the C=O bond.
- In contrast, the oxygen in OCH2CH5 is more electronegative and holds onto its electrons more tightly, making it a weaker electron donor.

5. **Conclusion**:
- Since NH2 is a stronger electron donor than OCH2CH5, it enhances the polarity of the C=O bond in acetamide more than in ethyl acetoacetate.
- Therefore, both the assertion and reason are true, and the reason correctly explains the assertion.

### Final Answer:
Both the assertion and reason are true, and the reason is a correct explanation of the assertion.