Which of the following are the features of the Arth Ganga model?
1. Reuse of sludge and wastewater.
2. Zero-budget natural farming.
3. Promoting tourism of Ganga.
Select the correct answer using the code given below:
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
All of the above