This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
Which of the following has small representation in somatosensory area of cerebral cortex 
Select and explain. 
A. Lips, B. Thumb/fingers, C. Tongue, D. Trunk
D: Trunk
Answer: D: Trunk 
Explanation: Ans. (d) Trunk(Ref: Ganong, 25th ed/p.169)Lips and thumb has got the maximum representation in somatosensory areaRepresentations for trunk and back are small