Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Days and Events

The International Day for the Preservation of the Ozone Layer is observed on

1
September 12
2
September 14
3
September 16
4
More than one of the above
5
None of the above
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