Answer :
The preamble to the Constitution of India is a brief
introductory statement that sets out the guiding purpose and principles
of the document. The preamble-page, along with other pages of the
original Constitution of India, was designed and decorated solely by renowned painter Beohar Rammanohar Sinha of Jabalpur who was at Shantiniketan with acharya Nandalal Bose at that time. Nandalal Bose
endorsed Beohar Rammanohar Sinha's artwork without any alteration
whatsoever. As such, the page bears Beohar Rammanohar Sinha's short
signature Ram in Devanagari lower-right corner.
That the preamble is not an integral part of the Indian constitution was declared by the Supreme Court of India in BeruBari case therefore it is not enforceable in a court of law. However, Supreme Court of India has, in the Kesavananda
case, overruled earlier decisions and recognised that the preamble may
be used to interpret ambiguous areas of the constitution where differing
interpretations present themselves. In the 1995 case of Union
Government Vs LIC of India also, the Supreme Court has once again held
that Preamble is the integral part of the Constitution.