| I: | is a largely tropical rainforest in South Africa | 
| II: | has the greatest biodiversity on Earth | 
| III: | produces about 20% of total oxygen in the earth’s atmosphere through photosynthesis | 
| 1. | Only I and II are correct | 
| 2. | Only I and III are correct | 
| 3. | Only II and III are correct | 
| 4. | I, II and III are correct | 
| 1. | It decreases exponentially. | 
| 2. | It increases exponentially. | 
| 3. | It increases at a decreasing rate. | 
| 4. | It remains constant. | 
| Assertion (A): | A forest in a tropical region like equador has upto 10 times as many species of vascular plants as . a forest of equal area in a temperate region like the midwest of USA. | 
| Reason (R): | Tropical environment unlike temperate ones, are less seasonal, relatively more constant and predictable. | 
| 1. | (A) is True but (R) is False | 
| 2. | (A) is False but (R) is True | 
| 3. | Both (A) and (R) are True and (R) is correct explanation of (A) | 
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |