| Column-I | Column-II | ||
| (a) | Corvus | (i) | Single circulation |
| (b) | Aedes | (ii) | Open circulation |
| (c) | Calotes | (iii) | Double circulation |
| (d) | Scoliodon | (iv) | Incomplete double circulation |
| 1. | a(ii), b(iii), c(iv), d(i) |
| 2. | a(iii), b(i), c(iv), d(ii) |
| 3. | a(iii), b(ii), c(iv), d(i) |
| 4. | a(iii), b(ii), c(i), d(iv) |