B. It is not an integral part of the constitution but acts as a torchbearer for the interpretation of the constitution.
The preamble to the Indian Constitution serves as an introduction to the Constitution and sets out the fundamental goals and objectives of the Constitution. It states the basic principles on which the Constitution is based, such as justice, liberty, equality, and fraternity. While the preamble is not an integral part of the Constitution and is not enforceable in a court of law, it is used as an aid to interpretation when the meaning of any provision of the Constitution is in doubt. It acts as a torchbearer for the interpretation of the Constitution.