The guardian of the constitution of India is
(a) India Parliament
(b) Supreme Court of India
(c) Prime Minister of India
(d) High Court of India.

Dear student,
(b)  Supreme Court of India is the guardian of the Constitution of India because it is the apex of judiciary in India, has the power of constitutional review, acts at the final interpreter of the Constitution and ensures that the fundamental rights are given to the citizens.
Regards