Study the given chart carefully and identify (a-d).
 
 
| a | b | c | d | |
| A | Sheep | Dog | Ant | Head louse | 
| B | Polar bear | Goat | Butterfly | Lady bug | 
| C | Penguin | Horse | Sparrow | Bee | 
| D | Polar bear | Cow | Peacock | Mosquito | 
Study the given chart carefully and identify (a-d).
 
 
| a | b | c | d | |
| A | Sheep | Dog | Ant | Head louse | 
| B | Polar bear | Goat | Butterfly | Lady bug | 
| C | Penguin | Horse | Sparrow | Bee | 
| D | Polar bear | Cow | Peacock | Mosquito |