The Preamble to the Constitution of India was adopted on October 17, 1949, which was AFTER the adoption of the operative provisions (Articles) on November 26, 1949. This is a historical fact. Option B is incorrect because the Preamble does not specifically mention fundamental rights - that's in Article 12-35. Option C is wrong because 'good livelihood' is not mentioned; the Preamble speaks of 'social, economic and political justice'. Option D is clearly wrong as the Preamble IS part of the Constitution (Kesavananda Bharati case).