Which of the following is correct about Union Public Service Commission of India?

Which one of the following is correct? Union Public Service Commission is a–

Which of the following statement is/are correct about UPSC - Union Public Service Commission and SPSC- State Public Service Commission?

In which of the following matters the State Public Service Commission is not consulted?

Which of the following facts is/are correct about the Chief Election Commissioner and other Election Commissioners?

Which Act established Public Service Commission in India for the first time?