The correct answer is: A. Ladakh
Ladakh has the highest number of biogas plants in India, with over 10,000 plants installed. The region is well-suited for biogas production due to its cold climate and high altitude, which make it ideal for the cultivation of crops that can be used as feedstock for biogas plants. Biogas is a renewable energy source that can be used to generate electricity, heat, and cooking gas. It is also a valuable fertilizer that can be used to improve soil health.
Jammu and Kashmir have a combined total of around 5,000 biogas plants. The region has a lower number of biogas plants than Ladakh due to its warmer climate and lower altitude, which make it less ideal for the cultivation of crops that can be used as feedstock for biogas plants.
None of these is the correct answer.