1.
Who was the first Prime Minister of India to officially declare September 14 as Hindi Diwas?
2.
Which article of the Indian Constitution declares Hindi in Devanagari script as the official language of the Union?
3.
On which date is Hindi Diwas celebrated in India every year?
4.
What is the primary objective of the Montreal Protocol, which is highlighted on the International Day for the Preservation of the Ozone Layer?
5.
Which international agreement is commemorated by the International Day for the Preservation of the Ozone Layer?
6.
On which date is the International Day for the Preservation of the Ozone Layer observed annually?
