Which one of the following statements regarding helium is incorrect [A

1.	Which one of the following statements regarding helium is incorrect [AIEEE 2004]
A.	It is used to produce and sustain powerful superconducting magnets
B.	It is used as a cryogenic agent for carrying out experiments at low temperatures
C.	It is used to fill gas balloons instead of hydrogen because it is lighter and non-inflammable
D.	It is used in gas-cooled nuclear reactors
Answer» D. It is used in gas-cooled nuclear reactors

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