Which one of the following gas is known as Noble Gas:

A) Hydrogen
B) Oxygen
C) Helium
D) Carbon Dioxide 

Details:
Group 8A (or VIIIA) of the periodic table are the noble gases or inert gases: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). The name comes from the fact that these elements are virtually unreactive towards other elements or compounds.

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