Q: Among the following, which one is the least in percentage by volume in the atmosphere?
(a)Hydrogen
(b)Argon
(c)Helium
(d)Neon
Correct Answer: (c)
The correct answer is (c): Helium. Subject: Quantitative Aptitude & Data Interpretation | Sub-topic: Numerical Ability Note: This answer was determined through AI-based research. Verify against the official answer key when available.