railway DFCCIL MTS 2025 Mock Test Series General Knowledge Ecology and Environment

भोपाळ गॅस दुर्घटनेत चुकून बाहेर पडलेला विषारी वायू ______हा होता.

1
मिथेन
2
नायट्रस ऑक्साईड
3
मिथाइल आयसोसायनेट
4
सायनोजेन
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