Hindi was declared as the official language of Union under Article _______of Indian Constitution.

Correct option is D

Correct Answer: (d) 343
Explanation:
· Article 343 of the Indian Constitution declares Hindi in the Devanagari script as the official language of the Union of India.
· It also states that the form of numerals to be used for official purposes will be the international form of Indian numerals.
· However, English was also allowed to be used for official purposes for a transitional period, which has been extended indefinitely.
Other Options:
· Article 333: Relates to the representation of Anglo-Indians in legislative assemblies, not the official language.
· Article 345: Deals with the official language of a state, allowing states to adopt their own official languages.
· Article 334: Pertains to the reservation of seats for Scheduled Castes and Scheduled Tribes in the Lok Sabha and state assemblies, not language.