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a
Open type without blood capillaries
b
Open type with blood capillaries
c
Closed type without blood capillaries
d
Closed type with blood capillaries
answer is D.
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Detailed Solution
Pheretima exhibits a closed type of blood vascular system (blood is confined to the heart and blood vessels). It consists of blood vessels, capillaries and heart. Blood capillaries are absent in open circulatory system where large blood vessels open directly into sinuses.