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The Convention on Biological Diversity was opened for signing at:
AStockholm 1972
BRio 1992
CKyoto 1997
DParis 2015
Answer & Solution
Correct answer: B. Rio 1992
1. CBD was opened for signature at the Rio Earth Summit in 1992.
2. It entered into force in 1993.
3. Hence Rio 1992.
_Source: UGC NET Paper 1 Study Book (ugc-net.com class notes) — CBD_