Prime Minister of India
The Prime Minister of India is the leader of the executive of the Government of India. The prime minister is also the chief adviser to the President of India and head of the Council of Ministers. They can be a member of any of the two houses of the Parliament of India—the Lok Sabha (House of the People) and the Rajya Sabha (Council of the States)—but has to be a member of the political party or coalition, having a majority in the Lok Sabha.
President of India
The president appoints as prime minister, the person most likely to command the support of the majority in the Lok Sabha (usually the leader of the majority party or coalition). the president then appoints the other members of the Council of Ministers, distributing portfolios to them on the advice of the prime minister. The Council of Ministers remains in power at the 'pleasure' of the president.