Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 General Knowledge Ecology and Environment Environmental pollution

खालीलपैकी कोणता वायू वायुमंडलीय प्रदूषक मानला जातो?

1
ऑक्सिजन
2
ओझोन
3
सल्फर डायऑक्साइड (SO2)
4
नायट्रोजन
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