Four charges Q1, Q2, Q3 and Q4 of same magnitude are fixed along the x axis at x = −2a,−a, +a and +2a, respectively. A positive charge q is placed on the positive y axis at adistance b > 0. Four options of the signs of these charges are given in List I. The directionof the forces on the charge q is given in List II. Match List I with List II and select the correct answer using the code given below the lists.
![](https://sahay.guru/wp-content/uploads/2020/10/24-1-19-1000x1024.jpg)
![](https://sahay.guru/wp-content/uploads/2020/10/24-2-17-1024x322.jpg)
![](https://sahay.guru/wp-content/uploads/2020/10/24-3-3-1024x853.jpg)
![](https://sahay.guru/wp-content/uploads/2020/10/24-4-2-1024x665.jpg)