Explanation:

- Option 1: Lack of awareness

- This can contribute to agricultural stagnation as farmers might not know about modern techniques or sustainable practices.

- Option 2: Lack of financial capital

- Without financial resources, farmers cannot invest in better technology, seeds, or irrigation systems.

- Option 3: Lack of resources

- This includes water, land fertility, or access to quality seeds, which are crucial for agricultural productivity.

- Option 4: Both (b) and (c)

- Financial capital and resources are often key constraints for farmers, affecting their ability to improve yields and implement effective farming methods.

- Correct Answer.