Explanation:

• Correct - The Preamble is considered an integral part of the Indian Constitution. This was clarified by the Supreme Court in the Kesavananda Bharati case (1973).

• Incorrect - The Preamble itself is not justiciable, meaning that its principles are not enforceable by a court of law. However, it serves as an aid for interpreting the Constitution's provisions.

• Incorrect - The Preamble can be amended. It was amended by the 42nd Constitutional Amendment in 1976, which added the words "Socialist," "Secular," and "Integrity."

So, one out of the three statements are correct.