Read the following statements and choose the following option: 1. The last twenty years alone have witnessed the disappearance of 7 species. 2. The IUCN Red List (2004) documents the extinction of 784 species in the last 500 years. 3. The IUCN Red List (2004) documents the extinction of 784 species in the last 50 years. 4. 35 per cent of all amphibian species and 3 per cent of all gymnosperm species in the world face