Which of the following could be X, Y and Z?
| X | Y | Z | |
| A | Ostrich | Duck | Kiwi |
| B | Emu | Goose | Ostrich |
| C | Penguin | Duck | Emu |
| D | Kiwi | Swan | Penguin |
Which of the following could be X, Y and Z?
| X | Y | Z | |
| A | Ostrich | Duck | Kiwi |
| B | Emu | Goose | Ostrich |
| C | Penguin | Duck | Emu |
| D | Kiwi | Swan | Penguin |