The Preamble to the Indian Constitution is:
ANot a part of the Constitution.
BA part of the Constitution but it neither confers any powers nor imposes any duties nor can it be of any use in interpreting other provisions of the Constitution.
CA part of the Constitution and can be of use in interpreting other provisions of the Constitution in cases of ambiguity.
DA part of the Constitution and it confers powers and imposes duties as any other provisions of the Constitution.