Which of the Following Statements Describe Truncus Arteriosus

Which of the following statements describe truncus arteriosus?
I.The pulmonary artery arises from the left ventricle,and the aorta stems from the right ventricle.
II.If PVR increases relative to systemic vascular resistance (SVR) ,more blood flows to the lungs through the truncus,decreasing systemic cardiac output.
III.If SVR decreases relative to PVR,blood flow will be shunted from right to left,bypassing the lungs.
IV.A large VSD allows total mixing of blood from the two ventricles.

A) I and III only
B) II and IV only
C) I,II,and IV only
D) I,III,and IV only