Question

Who is called as the guardian of constitution of india?

Answer 1

Supreme Court acts as guardian of constitution by exercising Writs Jurisdiction, Appellate Jurisdiction and Power of Judicial Review. There is lot of debate regarding terms such as 'guardian', 'custodian', 'protector' …..

Answer 2

The Courts of the nation i.e. the District courts or High Courts or the Supreme courts are called the Guardian of the Constitution.

Supreme Court is most particularly called as the guardian of the nation as any law made by the government is checked by it and it has right to inhibit the law.
In a nut shell the Judiciary is the Guardian of the Constitution of India.