The correct option is B 1993
The 'Convention on Biological Diversity' (CBD), known informally as the 'Biodiversity Convention', is a multilateral treaty. The convention has three main goals: conservation of biological diversity (or biodiversity); sustainable use of its components; and fair and equitable sharing of benefits arising from genetic resources. The convention was opened for signature at the 'Earth Summit' in Rio de Janeiro on 5 June 1992 and entered into force on 29 th December 1993.