Which of the following statements are correct about PM Surya Ghar Muft Bijli Yojana? (i) To install solar plants on one crore houses to provide up to 300 units of free electricity every month. (ii) Provision of 30 percent subsidy for setting up rooftop solar plants. (iii) 100 percent online system for registration, application, approval and grant. (iv) Provision of loan at bank interest of 4 percent to each applicant.