Which of the following graph represents the ohmic conductor?

Use these principles to arrive at the solution of the issue. Is the needed response. For a certain conductor, the value of its resistance is always constant, therefore when we adjust the voltage only current is changing its value according to voltage and not the resistance of the ohmic conductor.

Since current (I) in a conductor between two locations is exactly proportional to voltage according to Ohm's law (V).

$\Rightarrow I\propto V$
Now, (1/R), which is just the material's conductance, serves as the proportionality constant (as R is the resistance of the material).
$\Rightarrow I=\frac{1}{R}V$
As a result, as we adjust the voltage, the current likewise changes immediately in accordance with the voltage (because the conductor's resistance stays constant), as illustrated in the above diagram.
Voltage and current are thus exactly proportional in an ohmic conductor.
So, this is the appropriate response.

Hence, the correct answer is option C.