Which of the following statements about Preamble is correct?

● Option A is correct: The Preamble provides the source of authority of the Constitution as the people of India. ● Option B is incorrect: The Preamble provides liberty of thought, expression, belief, faith and worship. ● Option C is incorrect: The Preamble has been amended only once through 42nd Constitutional Amendment Act, 1976 which added three new words—Socialist, Secular and Integrity—to the Preamble. ● Option D is incorrect: In the Berubari Union case, the Supreme Court held that the Preamble is not a part of the Constitution. It is in the Kesavananda Bharati case that the Supreme Court held that the Preamble is part of the Constitution.