Imagine a world in which there are three kinds of electric charges instead of two. In this world, like charges repel and unlike charges attract. Let these types of charges be $A, B$ & $C$. Thus $A$ & $A$ repel, $A$ & $B$ attract, $A$ & $C$ attract and so on. Coulombs inverse square law is valid and superposition law is also valid like in our world. In this world like charges repel with force two times that of attraction between unlike charges.
Assumptions: In option 2, it is an equilateral triangle. In option 4, it is regular hexagon. In option 5, it is a square. In option 6, it is regular pentagon.
One or more than one options can be correct.