Which One of the Following Is the Best Example of the Central

Which one of the following is the best example of the central nervous system rather than peripheral nervous system) at work?

A) Parts of the hindbrain are involved in regulating heart rate.
B) Cells in the retina at the back of the eye transmit information about light.
C) Some cells in the nose respond to certain kinds of chemicals.
D) Some cells in the skin are sensitive to heat or cold.