| I. Circulatory system in arthropods is of closed type. |
| II. Parapodia in annelids help in swimming. |
| III. Phylum-Mollusca is the second largest animal phylum. |
| IV. Aschelminthes are dioecious. |
A) Only I
B) Only III
C) Only IV
D) III and IV
Correct Answer: A
Solution :
The arthropods have opentype circulatory system. It is the biggest group of animal kingdom and includes insects.
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