Consider the given two statements:
| Assertion (A): | Roundworms are considered pseudocoelomates. |
| Reason (R): | They have a body cavity not lined with mesoderm. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
| I: | having radial symmetry in adults and larvae |
| II: | having three germ layers |
| III: | lacking a coelom |