Open circulatory system is present in :
(A) Arthropods (B) Annelids (C) Chordates (D) Molluscs

Options

A. C only
B. C and B
C. A and B
D. A only

Explanation

Closed circulatory systems have the blood closed within blood vessels. It is the characteristics feature of Annelida and chordate. Open circulatory systems have the blood flows in a fluid filled cavity characteristic of Arthropods and Mollusca.