A virus has attacked neurons of the somatic sensory system of your patient. This virus 'hides out' or lives in the cell bodies of 2^nd  order neurons. You have developed a drug to inactivate or 'kill' the virus but it must be applied near to where the virus is located. Where would you deliver this drug? In the...

a.  thalamus           

b. primary motor cortex   

c.  postcentral gyrus            

d.  dorsal root ganglia         

e.  dorsal gray horn