The "Red Data Books" published by the International Union for Conservation of Nature and Natural Resources (IUCN) contain lists of
1. Endemic plant and animal species present in the biodiversity hotspots.
2. Threatened plant and animal species.
3. Protected sites for the conservation of nature and natural resources in various countries.
Select the correct answer using the codes given below:
1. 1 and 3
2. 2 only
3. 2 and 3
4. 3 only