Jnanpith Award, the highest literary honor in India, has been awarded to several Assamese writers, including:

Birendra Kumar Bhattacharya
Mamoni Raisom Goswami
Homen Borgohain
Both a and b

The correct answer is: d) Both a and b.

Birendra Kumar Bhattacharya (1934-1994) was an Indian poet, novelist, and short story writer from Assam. He was awarded the Jnanpith Award in 1979 for his novel “Ahoban”.

Mamoni Raisom Goswami (1942-2001) was an Indian novelist, short story writer, essayist, and critic from Assam. She was awarded the Jnanpith Award in 1997 for her novel “The Moth Eaten Howdah of the Tusker”.

Homen Borgohain (born 1932) is an Indian novelist, short story writer, and essayist from Assam. He was awarded the Jnanpith Award in 2014 for his novel “The Story of the Last Prince”.

The Jnanpith Award is the highest literary honor in India. It is awarded annually by the Bharatiya Jnanpith Trust to an Indian writer for their outstanding contribution to literature. The award consists of a cash prize of ₹10 lakh, a shawl, and a citation.