Consider the following organisations: 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?

1. The Department of Atomic Energy (DAE), established in 1954, is responsible for nuclear technology development and applications in India. 2. Organisation 1: Atomic Minerals Directorate for Research and Exploration (AMD) is the oldest unit of DAE and is responsible for surveying, prospecting, and exploration of atomic minerals. (Under DAE) 3. Organisation 2: Heavy Water Board (HWB) is responsible for the production of heavy water, which is used as a moderator and coolant in nuclear reactors. (Under DAE) 4. Organisation 3: Indian Rare Earths Limited (IREL), now IREL (India) Limited, is a government-owned corporation that processes rare earth elements and minerals, including thorium and uranium resources relevant to atomic energy. (Under DAE) 5. Organisation 4: Uranium Corporation of India Limited (UCIL) is responsible for mining and processing uranium ore. (Under DAE) 6. All four listed organisations are constituent units or Public Sector Undertakings under the administrative control of the Department of Atomic Energy.