Q: Which one of the following gas smells like a rotten egg?
(a)Ammonia
(b)Hydrogen sulphide
(c)Acetylene
(d)Sulphur dioxide
Correct Answer: (b)
The correct answer is (b): हाइड्रोजन सल्फाइड. Subject: General Studies | Sub-topic: Miscellaneous Note: This answer was determined through AI-based research. Verify against the official answer key when available.