Explanation:

• Through Keshavananda Bharti case and LIC of India case, it is established that preamble is a part of
• India constitution. And also two things should be noted
• The preamble is neither a source of power to legislature nor a prohibition upon powers of legislature. It is just a foreword to constitution. Legislature does not derive power from preamble.
• Both Fundamental duties and Directive Principles of State Policy are non justiciable i.e., they cannot be enforced in the courts of law.
• The Fundamental Rights are not absolute and subject to reasonable restrictions. Further , they are not sacrosanct and can be curtailed or repealed by the Parliament through a constitutional amendment act. They can also be suspended during the operation of a National Emergency except the rights guaranteed by Articles 20 and 21.