Which of the following statements about pulmonary emboli is not correct
a.60-80 % pulmonary emboli are clinically silent
b.In more than 95% cases venuous emboli originate from deep leg veins
c.Embolic obstruction of pulmonary vessels almost always cause pulmonary infarction
d.Embolic obstruction of medium sized arteries may result in pulmonary infarction
ans:c.Embolic obstruction of pulmonary vessels almost always cause pulmonary infarction