Question
Three point charges are placed at the corners of an equilateral triangle. Assuming only electrostatic forces to be acting :
A) If charges have different magnitude and signs , the system will be in equilibrium.
B) system will be in equilibrium if charges have same magnitude but different signs.
C) the system can never be in equilibrium.
D) the system will be in equilibrium if charges rotate about the centre.
Please explain the above question in detail