The correct answer is: B. Bhagalpur
Sulabh International launched its cheapest drinking water project ‘Sulabh Jal’ in Bhagalpur, Bihar in 2019. The project aims to provide clean and affordable drinking water to the people of Bhagalpur. The project is being implemented in collaboration with the Bihar government.
The project is based on the concept of rainwater harvesting. Rainwater is collected from rooftops and stored in underground tanks. The water is then treated and purified before being supplied to the people. The project is expected to benefit over 1 lakh people in Bhagalpur.
The project has been well-received by the people of Bhagalpur. They have welcomed the initiative of Sulabh International and the Bihar government to provide them with clean and affordable drinking water.
The other options are incorrect because:
- Option A is incorrect because Patna is the capital of Bihar.
- Option C is incorrect because Darbhanga is a city in Bihar.
- Option D is incorrect because Purnea is a city in Bihar.
- Option E is incorrect because Sulabh International launched its cheapest drinking water project ‘Sulabh Jal’ in Bhagalpur, Bihar in 2019.