PM SHRI Schools have the following features: 1. It is a centrally sponsored scheme under which more than 15,000 schools will be qualitatively strengthened to include all components of the National Education Policy. 2. Such schools will be developed as Green Schools incorporating environment-friendly aspect. 3. PM SHRI Schools will be developed by strengthening the existing schools from amongst schools managed by central government only. 4. PM SHRI Schools will be developed by strengthening the existing schools from amongst schools managed by central government / State / U.T. government / local bodies / KVS / NVS. Which of the options given above is/are correct?