A. 90% Hydrogen, 10% Nitrogen
B. 80% Nitrogen, 20% Hydrogen
C. 60% Nitrogen, 40% inert gases
D. None of these
Explanation:
Several elements have been detected in the lunar atmosphere. Detectors left by Apollo astronauts have detected argon-40, helium-4, oxygen, methane, nitrogen, carbon monoxide and carbon dioxide.
