The correct answer is: 1 volt/meter is same as 1 newton/coulomb.
1 volt/meter is the definition of the electric field strength. The electric field strength is a vector quantity that describes the electric force per unit charge acting on a test charge at a point in space. The electric field strength is equal to the potential difference divided by the distance between the two points.
1 newton/coulomb is the definition of the electric force. The electric force is a force that acts between two charged particles. The electric force is proportional to the product of the charges and inversely proportional to the square of the distance between the charges.
The other options are incorrect because they do not have the same units as 1 volt/meter. 1 meter/coulomb is the unit of electric potential gradient. 1 joule/coulomb is the unit of energy per unit charge.