This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Injury occurs at C7 root, in what pa of arm, sensation will be lost ? 
Select and explain. 
A. Upper medial, B. Lower medial, C. Posterior, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: Ans. is 'd' i.e., None of the above