Community development is block comprises of:

I need the correct answer to provide a thorough explanation. Please provide the correct answer, and I'll create a detailed explanation.

Once I have the correct answer, I'll provide a well-structured explanation with the required sections:

1. **Core Concept**
2. **Why the Correct Answer is Right**
3. **Why Each Wrong Option is Incorrect**
4. **Clinical Pearl / High-Yield Fact**
5. **Correct Answer Line**

Please provide the correct answer so I can assist you with the explanation.

✓ Correct Answer: B. 100 villages and 100000 population