Match the following
| List-I | List-II | ||
|---|---|---|---|
| A. | Parasitic castration | I. | Sacculina |
| B. | Gigantism | II. | Larvae of liver fluke |
| C. | Hyperplasia | III. | Fasciola in sheep bile duct |
| D. | Hypertrophy | IV. | Plasmodium |
Find the variance of the following frequency distribution:
| Class Interval | ||||
| 0--4 | 4--8 | 8--12 | 12--16 | |
| Frequency | 1 | 2 | 2 | 1 |