The correct answer is A. Orissa.
The Heavy Water Plant at Talcher is a public sector undertaking under the Department of Atomic Energy, Government of India. It is located in the Talcher coalfield in the Angul district of Odisha. The plant was commissioned in 1960 and has a capacity of producing 200 tonnes of heavy water per year.
The Paradeep Phosphates Limited is a public sector undertaking under the Ministry of Chemicals and Fertilizers, Government of India. It is located in the Paradeep Port area in the Jagatsinghpur district of Odisha. The plant was commissioned in 1992 and has a capacity of producing 2.2 million tonnes of urea per year.
The other options are incorrect because:
- Kerala does not have any heavy water plants or fertilizer plants.
- Tamil Nadu has a few heavy water plants, but no fertilizer plants.
- Andhra Pradesh has a few fertilizer plants, but no heavy water plants.