Explanation:

In 1971, the Supreme Court held that even after the dissolution of the Lok Sabha, the council of ministers does not immediately cease to hold office. Article 74 is mandatory and, therefore, the president cannot exercise the executive power without the aid and advice of the council of ministers. Any exercise of executive power without the aid and advice will be unconstitutional as being violative of Article 74. Such an  advice is binding on President as it does under normal circumstances. They enjoy this power until new CoM is appointed after fresh elections. But when Lok Sabha is dissolved & the CoM loses its Confidence too, then the advice rendered by them to President is not binding.