Explanation:

Bharat Ratna is the highest civilian award in India. It is awarded for exceptional service towards the advancement of art, literature, and science, and in recognition of public service of the highest order. The award was instituted in 1954 and is conferred by the President of India. Here is a detailed explanation of the question:

Who among these has not been awarded Bharat Ratna?

a) Sachin Tendulkar
b) Lata Mangeshkar
c) Dhyan Chand
d) Satyajit Ray

The correct answer is option 'C' which means Dhyan Chand has not been awarded Bharat Ratna. The other three options have been conferred with the award.

Here are some additional details about the personalities mentioned in the question:

- Sachin Tendulkar: He is a former Indian cricketer and is considered one of the greatest batsmen of all time. He has numerous records to his name and has been awarded the Bharat Ratna in 2014.

- Lata Mangeshkar: She is an Indian playback singer and has been active in the industry for over 70 years. She has recorded songs in various languages and has won several awards including the Bharat Ratna in 2001.

- Dhyan Chand: He was an Indian field hockey player and is considered one of the greatest players in the history of the sport. He has won three Olympic gold medals for India and has been nominated for the Bharat Ratna multiple times, but has not been conferred with the award yet.

- Satyajit Ray: He was an Indian filmmaker and is considered one of the greatest filmmakers of the 20th century. He has directed several critically acclaimed films and has won numerous awards including the Bharat Ratna in 1992.

In conclusion, the correct answer to the question is option 'C' which means Dhyan Chand has not been awarded Bharat Ratna.