Consider the following regarding schemes running in Punjab under water and sanitation programmes.
1. Swachh Bharat Abhiyaan
2. Installation of RO Systems
3. Swachhata Pakhwada
4. Water Supply and Sanitation Project
Which among the following is a scheme running in Punjab at present?

A. 1, 2 and 3

B. 1, 2 and 4

C. 1, 3 and 4

D. 1, 2, 3 and 4

Answer: Option D