| A | B | C | D | |
| 1. | Ovisac | Ovary | Cloaca | Ureter |
| 2. | Oviduct | Ovary | Urinogenital tract | Cloaca |
| 3. | Ovisac | Cloaca | Oviduct | Anus |
| 4. | Oviduct | Ovary | Ureter | Cloaca |
| I: The buccal cavity | II: Skin | III: Lungs |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
| 1. | 10 pairs | 2. | 11 pairs |
| 3. | 12 pairs | 4. | 6 pairs |
| Column-I | Column-II | ||
| A. | Fore-brain | (i) | A pair of optic lobes |
| B. | Mid-brain | (ii) | Cerebellum and medulla oblongata |
| C. | Hind-brain | (iii) | Olfactory lobe, paired cerebral hemisphere, unpaired diencephalon |