【名词&注释】
肺动脉缺如(absence of pulmonary artery)、肺循环(pulmonary circulation)、主动脉弓(aortic arch)、肺动脉干(pulmonary trunk)、右肺动脉(right pulmonary artery)
[单选题]永存动脉干患者左、右肺动脉(right pulmonary artery)起源最常见的类型是( )
A. 左、右肺动脉(right pulmonary artery)起源于动脉干后壁
B. 左、右肺动脉(right pulmonary artery)分别起源于动脉干侧壁
C. 左、右肺动脉(right pulmonary artery)起源于共同肺动脉干
D. 左、右肺动脉(right pulmonary artery)起自主动脉弓及其分支
E. 左、右肺动脉(right pulmonary artery)缺如,肺循环由侧支供血