engineering recuitment NPCIL Stipendiary Trainee (Category II) Prelims 2025 Mock Test General Knowledge Geography (World Geography) Climatology

निम्नलिखित में से कौन ओजोन को नष्ट करता है?

1
सल्फर
2
कार्बन 
3
क्लोरीन 
4
सिलिकॉन 
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