MCQOPTIONS
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| 1. |
Out of the four alternatives, choose the one which can be substituted for the given words/sentences and click the button corresponding to it._x005F_x000D_ Animals without a backbone. |
| A. | Marsupials |
| B. | Mammals |
| C. | Vertebrate |
| D. | Invertebrates |
| Answer» E. | |