Fthe electric field is zero at a particular point, must the electric potential be zero at the same point? explain

No

Explanation:

As we know that the electric field nullity does not define that the electric potential will be zero at that point.

For example consider the two positive charge at the mid point of these charge electric field is zero but potential is finite.The electric potential has two contribution means it is positive if charges are positive and it is negative if charges are negative.