Exp) Option a is the correct answer.

In Britain, every order of the King for any public act is countersigned by a minister. If the order is in violation of any law, the minister would be held responsible and would be liable in court. But in India, there is no provision in the Constitution for the system of legal responsibility of a minister. It means, it is not required that an order of the President for a public act should be countersigned by a minister. Moreover, the courts are barred from enquiring into the nature of advice rendered by the ministers to the president.