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Which one of the following days is not observed in the month of October ?
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- Indian Air-force Day
- U.N. Day
- World Environment Day
- International Day of Nonviolence
- Indian Air-force Day
Correct Option: C
World Environment Day is celebrated every year on 5 June to raise global awareness of the need to take positive environmental action. It is run by the United Nations Environment Programme (UNEP).
