The correct option is B 24 January 1950
The National Anthem of India Jana-gana-mana, composed originally in Bengali by Rabindranath Tagore, was adopted in its Hindi version by the Constituent Assembly as the National Anthem of India on 24 January 1950. It was first sung on 27 December 1911 at the Kolkata Session of the Indian National Congress. Hence, Option A is correct.