【单选题】
如图所示,根据基尔霍夫电流定律,下列方程错误的是()<br /> <img src="https://nimg.ppkao.com/2019-05/tangling/2019051414560336383.jpg?sign=8e9d78ff7625edec759edafed2be586e&t=62d5cf7e" />
A、I1+I6-I4 =0
B、I1-I2+I3 =0
C、I3-I5-I6 =0
D、I3+I4-I2-I6 =0