The correct options are
B Leader of the Council of Ministers
C Main advisor to the President
D A part of the Parliament
Once elected, the Prime Minister is seen as the Leader of the Nation. He/She acts as a link between the various departments of the government. The Prime Minister exercises power through three main roles. One, as the Leader of the Council of Ministers. Second, as a part of the Parliament. And third, as the main advisor to the President. So, it is clear that the Prime Minister is involved in almost all facets of the government and makes most of the important decisions. So, he can be regarded as a true leader of the nation.