The correct answer is (b). Nanaji Deshmukh was not awarded the Bharat Ratna in 2019. The other three options, Pranab Mukherjee, Atal Bihari Vajpayee, and Bhupen Hazarika, were all awarded the Bharat Ratna in 2019.
Pranab Mukherjee was the 13th President of India. He was a politician who served as the Finance Minister of India from 2004 to 2012. He was also the External Affairs Minister of India from 1995 to 1996 and the Defence Minister of India from 1996 to 2004.
Atal Bihari Vajpayee was the 10th Prime Minister of India. He was a politician who served as the Prime Minister of India from 1998 to 2004. He was also the Foreign Minister of India from 1977 to 1979 and the Leader of the Opposition in the Lok Sabha from 1996 to 1998.
Bhupen Hazarika was an Indian singer, songwriter, musician, and poet. He was known for his work in Assamese music and literature. He was also a politician who served as the Governor of Assam from 2001 to 2004.
The Bharat Ratna is the highest civilian award in India. It is awarded to citizens of India in recognition of their exceptional service to the nation. The award was instituted in 1954 by the first Prime Minister of India, Jawaharlal Nehru.