Question: Azfar Hussain (Bengali: আজফার হোসেন ) is a Bangladeshi theorist, critic, academic, bilingual writer, poet, translator, and activist, Bengali, is also known by its endonym Bangla, it's the national, and official language of which country?
Sentence (from "Bengali language"): It is the national and official language of the People's Republic of Bangladesh, and the official language of some eastern and north-eastern states of the Republic of India, including West Bengal, Tripura, Assam (Barak Valley) and Andaman and Nicobar Islands.
Relevant evidence: Yes