Most stable radical among the following is:

Options

A.
B.
C.
D.

Explanation

To determine the most stable radical among the given options, we will analyze each radical based on hyperconjugation and resonance stabilization.

### Step-by-Step Solution:

1. **Identify the Radicals**:
- Let's denote the radicals as A, B, C, and D for analysis.

2. **Analyze Radical A**:
- Radical A has 2 hydrogen atoms attached to the carbon bearing the radical.
- Hyperconjugation: Each hydrogen can contribute to hyperconjugation. In this case, there are 4 hydrogen atoms contributing to hyperconjugation.
- Stability: Moderate stability due to limited hyperconjugation.

3. **Analyze Radical B**:
- Radical B has 3 hydrogen atoms on one side and 2 on the other.
- Hyperconjugation: This gives a total of 7 hydrogen atoms contributing to hyperconjugation.
- Stability: More stable than A due to increased hyperconjugation.

4. **Analyze Radical C**:
- Radical C has 2 hydrogen atoms, 1 hydrogen atom, and 3 hydrogen atoms on the respective carbons.
- Hyperconjugation: This gives a total of 6 hydrogen atoms contributing to hyperconjugation.
- Additionally, there is a double bond present which can participate in resonance stabilization.
- Stability: The resonance effect from the double bond significantly increases the stability of this radical, making it the most stable among the options.

5. **Analyze Radical D**:
- Radical D has only 1 hydrogen atom attached.
- Hyperconjugation: This contributes to only 1 hydrogen atom for hyperconjugation.
- Stability: This is the least stable radical due to minimal hyperconjugation and lack of resonance.

6. **Conclusion**:
- Comparing the stability of all radicals:
- A: Moderate stability (4 hyperconjugation)
- B: More stable than A (7 hyperconjugation)
- C: Most stable due to resonance and hyperconjugation (6 hyperconjugation + resonance)
- D: Least stable (1 hyperconjugation)
- Therefore, the most stable radical is **C**.

### Final Answer:
The most stable radical among the given options is **C**.