Heavy water used in Nuclear reactors is also called?

A. Distilled water
B. PH 7
C. Tritium Oxide
D. Deuterium Oxide 

🧠 Explanation:

Heavy water, used in nuclear reactors, is also called Deuterium Oxide. “Called” is a past participle verb; “compound” is a noun. Alternatives like “D2O” or “isotope water” exist. Understanding its properties and use is essential in nuclear chemistry, physics, and energy research applications.