Q.  Which one among the following was the objective of starting the Nirmal Gram Puraskar incentive scheme?

1. Encourage Panchayati Raj Institutions to take up sanitation promotion for attaining 100% open defecation-free environment
2. Enable rural schools to provide safe and clean drinking water for children
3. Provide toilets to all rural households
4. Provide financial assitance to States to install water purification systems in rural schools