Which set of materials is used as a moderator in nuclear reactor?

1.	Which set of materials is used as a moderator in nuclear reactor?
A.	Zircalloy & berrylium
B.	Zircalloy & heavy water
C.	Zirconium & berrylium
D.	Heavy water & berrelium
Answer» E.

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Which set of materials is used as a moderator in nuclear reactor?

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