Who among the following Presidents of India was associated with Trade Union Movement?

Among the following Presidents of India, who was also the Secretary General of Non-Aligned Movement for some period ?

Who among the following Chief Justices of India also acted as the President of India?

Which of the following statements is correct about the President of India?

Which one of the following has the power to initiate the Motion of Impeachment of the President of India?

Among the following who has been Speaker of Lok Sabha prior to his Election as President of India ?