Which among the following have open circulatory system?
(i) Arthropoda (ii) Mollusca
(iii) Annelida (iv) Coelenterata

Options

A. (i) and (ii)
B. (iii) and (iv)
C. (i) and (iii)
D. (ii) and (iv)

Answer

A

Explanation

Blood vascular system is of two types open system and closed system
`{:("Open System",,"Closed System"),("Low pressure system",,"High pressure system"),("Blood is conveyed directly to organs without formation of capillaries",,"Blood is conveyed directly to the organs through capillaries"),("Distribution of blood is not well regulated",,"Distribution of blood is well regulated and controlled"),("Found in leeches, most arthropods and molluscs",,"Found in annelidas a except leeches cephalopods and vertebrates."):}`