According to the statement of OHM's Law,
The current in an electric circuit is directly proportional to the voltage across that circuit. This means, larger the voltage , more will be the current flow. Mathematically this can be stated as:
I = V/R
Here 1/R is the constant of proportionality and R represents the Resistance of the circuit.
This equation is also stated in texts as:
V = IR
So, the correct answer is option A. Voltage