Two point charges $+q_{1}and-q_2$  are placed at A and B respectively. An electric line of force emerges from  $q_1$ making an angle $\alpha ={60}^{\circ }$ with line AB and terminates at $-q_2$ making an angle of  ${90}^{\circ }$ with the line AB. Mark correct options

$\left|\frac{q_1}{q_2}\right|=2$

The maximum value of angle $\alpha$ at which a line emitted from  $q_1$ terminates on charge $q_2$ is ${90}^{\circ }$ 

Net electric field is zero on the line joining A & B at some point right of point B

Half of the lines emerging from A terminate at infinity