| List-I | List-II | ||
| A. | Robert May | I. | Species-Area relationship |
| B. | Alexander von Humboldt | II. | Long term ecosystem experiment using outdoor plots |
| C. | Paul Ehrlich | III. | Global species diversity is about 7 million |
| D. | David Tilman | IV. | Rivet Popper hypothesis |
| 1. | A-III, B-I, C-IV, D-II | 2. | A-I, B-III, C-II, D-IV |
| 3. | A-III, B-IV, C-II, D-I | 4. | A-II, B-III, C-I, D-IV |