Answer: Option B
Voice of Conscience is a book written by V V Giri, who served as the President of India from 1969 to 1974. V V Giri was a freedom fighter, labor leader, and politician who played an important role in India's struggle for independence and in the development of the labor movement in India.
Here are some relevant definitions and formulas related to the Indian Presidency:

1. President of India: The President of India is the head of state of India and the commander-in-chief of the Indian Armed Forces.
2. Election of President: The President of India is elected by an Electoral College consisting of elected members of both houses of parliament (Lok Sabha and Rajya Sabha) and elected members of the Legislative Assemblies of the states.
3. Term of Office: The President of India serves a term of five years, and can be re-elected for a maximum of two terms.
4. Powers and Functions: The President of India has various powers and functions, including the power to appoint and remove judges of the Supreme Court and High Courts, the power to grant pardons and reprieves, and the power to summon and prorogue the Parliament.
5. Impeachment: The President of India can be impeached by the Parliament for violation of the Constitution or gross misconduct.

In conclusion, V V Giri was the author of the book 'Voice of Conscience.' He was also the President of India from 1969 to 1974 and played an important role in the Indian freedom struggle and the development of the labor movement in India.