Open circulatory system is present in `underline(("i"))` and `underline(("ii"))`. Fill the correct option for (i) and (ii)

Options

A. `"(i)-platyhelminthes (ii)-molluscs"`
B. `"(i)-arthropods (ii)-echinoderms"`
C. `"(i)-annelids (ii)-arthropods"`
D. `"(i)-arthropods (ii)-molluscs"`

Answer

D

Explanation

Open circulatory system is present in arthropods and mollusus in which blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses.