Organic farming is a

Options

A. farming with minimal or no use of chemical fertilisers, pesticides, etc.
B. farming system where organic compounds are used
C. farming system in which organic manures, biofertilisers, biopesticides, etc, are used
D. both (a) and (c).

Explanation

### Step-by-Step Solution:

1. **Understanding Organic Farming**: Organic farming is a method of agriculture that focuses on growing crops without the use of synthetic chemicals, fertilizers, or pesticides. Instead, it relies on natural processes and materials.

2. **Identifying Key Characteristics**: The main characteristics of organic farming include:
- Minimal or no use of chemical fertilizers and pesticides.
- Use of organic manure, biofertilizers, and bio-pesticides.

3. **Evaluating the Options**:
- **Option A**: "Farming with minimal or no use of chemical fertilizers, pesticides, etc." - This is correct as it aligns with the definition of organic farming.
- **Option B**: "Farming system where organic compounds are used." - This is incorrect because simply using organic compounds does not define organic farming.
- **Option C**: "Farming system in which organic manure, biofertilizers, and bio-pesticides are used." - This is correct as these are essential components of organic farming.
- **Option D**: "Both A and C" - Since both A and C are correct, this option is also correct.

4. **Conclusion**: Based on the evaluation, the correct answer is that organic farming is characterized by both minimal or no use of chemical fertilizers and pesticides (Option A) and the use of organic manure, biofertilizers, and bio-pesticides (Option C). Therefore, the best choice is Option D, which states that both A and C are correct.

### Final Answer: Organic farming is characterized by both A and C.

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