Three of the following criteria have contributed to the recognition of Western Ghats, Sri Lanka and Indo Burma regions as hotspots of biodiversity :
1. Species richness
2. Vegetation density
3. Endemism
4. Ethno-botanical importance
5. Threat perception 6. Adaption of flora and fauna to warm and humid conditions
Which three of the above are correct criteria in this context?
(a) 1, 2 and 6 (b) 2, 4 and 6 (c) 1, 3 and 5 (d) 3, 4 and 6