补体经典途径激活中的C5转化酶是()
A . ['Chttps://assets.asklib.com/psource/2015120209210037536.jpg
B . Chttps://assets.asklib.com/psource/2015120209210746494.jpg
C . Chttps://assets.asklib.com/psource/201512020921126241.jpg
D . Chttps://assets.asklib.com/psource/2015120209211742205.jpg
E . Chttps://assets.asklib.com/psource/2015120209212215069.jpg