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 coex? 
Select and explain. 
A. Lips, B. Thumb, C. Tounge, D. Trunk
D: Trunk
Answer: D: Trunk 
Explanation: Trunk region has the smallest representation on the cerebral coex Ref: guyton and hall textbook of medical physiology 12 edition page number:841,842,843