Explanation: Sardar Vallabh Bhai Patel was the first Deputy Prime Minister of India. He held this post from is August 1947 to is December 1950. There is no such post of Deputy Prime Minister in constitution. So, he is not liable to take any salary and allowances as Deputy Prime Minister. That is why, he has to hold a post of Cabinet Minister too. Unofficially he is declared 2nd in rank in Council of Ministers after Prime Minister at first.