Explanation:

- The Green Energy Corridor is a major power transmission project aimed at evacuating renewable energy, especially from solar and wind sources, across India including Rajasthan.

- In Rajasthan, this corridor passes through several districts that are key to renewable energy production.

- Ajmer, Chittorgarh, Bikaner (Option 1): All three are important locations. Bikaner and Chittorgarh are hubs for solar and wind energy. Ajmer is a transmission junction.

- Jodhpur, Jaipur, Alwar (Option 2): Jodhpur is a major solar hub. Jaipur acts as a central node. Alwar does not have a significant presence in the corridor plans.

- Udaipur, Bhilwara, Jaipur (Option 3): Udaipur and Bhilwara are not core to the main green energy corridors, though Jaipur is significant.

- Kota, Ajmer, Jodhpur (Option 4): Kota is not on the main corridor route, though Ajmer and Jodhpur are included.

Correct Answer: Option 1 - Ajmer, Chittorgarh, Bikaner