You add TTX to determine the effect on the generated action potential. What is the pharmacological mechanism of TTX in neurons.

A. TTX inactivates potassium leak channels, that alters resting membrane potential.

B. TTX is glutamatergic receptor antagonist that prevents synaptic transmission.

C. TTX is a potent voltage gated potassium channel blocker the prevent the repolarization of a neuron.

D. TTX is a voltage gated sodium channel blocker that prevents action potential generation.