Answer: At Y electric field is strongest.
Explanation :
The space around a charged particle in which the effect of the electric force is experienced is called electric field.
The electric field lines are the imaginary lines. The field lines for the positive charge is outwards and for negative charge, it is inwards.
The field lines are strongest at the point where the field lines are compact or very close.
In this case, the electric field is strongest at point Y.
Hence, the correct option is (c) " point Y ".