Option 1 -> 1992 is when the UN Convention on Biological Diversity was signed at the Rio Earth Summit, not when India enacted its domestic Act.
Option 2 -> 1998 is not the year of enactment of the Biological Diversity Act in India.
Option 3 -> 2002 is when the Parliament of India enacted the Biological Diversity Act to give effect to the provisions of the UN Convention.
Option 4 -> 2012 is incorrect; the Act was already in force well before this year.
Hence, Option 3: 2002 -> The Biological Diversity Act was passed by the Indian Parliament in 2002 to provide for conservation of biological diversity, sustainable use of its components, and fair and equitable sharing of benefits arising from the use of biological resources, thereby fulfilling India's obligations under the UN Convention on Biological Diversity (1992) -> correct