Which Sensory Distinction is Not Encoded by a Difference in Neuron

Question

Which sensory distinction is not encoded by a difference in neuron identity?
A) white and red
B) red and green
C) loud and faint
D) salty and sweet
E) spicy and cool

Accepted Answer

The distinction between loud and faint sounds is encoded by the same neurons through differences in firing rate or intensity, not by different neuron identities.