In the circulatory system of Pheretima a, b, c, and d respresent

Options

A. a - lateral hearts, b - Sub-neural vessel, c - commissural vessel, d - lateral oesophageal vessel
B. a - lateral hearts, b - lateral oesophageal vessel, c- subneural vessel, d - commissural vessel
C. a - lateral hearts, b - commissural vessel, c- subneural vessel, d- oesophageal vessel
D. a- commissural vessels, b-lateral hearts, c - lateral oesophageal vessel, d- subneural vessel

Answer

C