Consider the following organizations:
1. Atomic Minerals Directorate for Research and Exploration
2. Heavy Water Board 3. Indian Rare Earths Limited
4. Uranium Corporation of India
Which of these is/are under the Department of Atomic Energy?
(a) 1 only (b) 1 and 4 (c) 2, 3 and 4 (d) 1, 2, 3 and 4