English is a subsidiary official language of India: what is the main official language?

Answer 1

The Indian constitution, in 1950, declared Hindi in Devanagari script to be the official language of the union. Unless Parliament decided otherwise, the use of English for official purposes was to cease 15 years after the constitution came into effect, i.e., on 26 January 1965.

Answer 2

The Constitution of India designates a bilingual approach for official language of the Government of India employing usage of Hindi written in the Devanagari script, as well as English.