In which of the following cases the Supreme Court applied the doctrine of public trust that the state as a trustee of all natural resources is under a legal duty to protect the natural resources. These natural resources are meant for public use and cannot be converted into private ownership ?
[A] M.C. Mehta Vs. Union of India (Ganga Water Pollution Case)
[B] M.C. Mehta Vs. Kamalnath and others
[C] M.C. Mehta Vs. Union of India (Replacing diesel vehicles by CNG vehicles)
[D] Rural Litigation and Entitlement Kendra Vs. State of U.P