✅ The correct answer is option B.
Opened for signature in 1968, the Nuclear Non-Proliferation Treaty entered into force in 1970. On 11 May 1995, the Treaty was extended indefinitely. A total of 191 States have joined the Treaty, including the five nuclear-weapon States.
✅ The correct answer is option C.
International Literacy Day is an international observance, celebrated each year on 8 September, that was declared by UNESCO on 26 October 1966 at the 14th session of UNESCO’s General Conference.
✅ The correct answer is option A.
Since 1967, on or around Hans Christian Andersen’s birthday, 2 April, International Children’s Book Day (ICBD) is celebrated to inspire a love of reading and to call attention to children’s books.
✅ The correct answer is option D.
International Youth Day (IYD) is the brainchild of the United Nations, and was first celebrated on 12 August 2000, after the UN General Assembly passed a resolution accepting the recommendation made by the World Conference of Ministers Responsible for Youth in Lisbon in 1998.