(i) Here, in the figure, the electric, lines of force
emanate from A and C. Therefore, charges A and C must be positive.
(ii) The number of electric lines of force emanating is
maximum from charge C here, so C must have the largest magnitude.
(iii) Point between two like charges where electrostatic force is zero is called neutral point. So, the neutral point lies between A and C only.Now, the position of neutral point depends on the strength of the forces of charges. Here more number of electric lines of force show higher strength of charge C than A. So, neutral point lies near A.