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: Surgery
A patient involved in a road traffic accident presents with quadriparesis, sphincter disturbance, sensory level up to the upper border of sternum and a respiratory rate of 35/minute.The likely level of lesion is: 
Select and explain. 
A. C1-C2, B. C4-C5, C. T1-T2, D. T3-T4
B: C4-C5
Answer: B: C4-C5 
Explanation: Spinal cord lesion at C4-C5 shows impaired diaphragm activity, increased rate of respiration compensated by intact accessory muscles of respiration. Sensations are spared till the sternal border. Deltoid and biceps muscles are also spared. Ref: The Cervical Spine By Charles Richard Clark, Edward C.Benzel, 2005, Page 181; Harrison's Principles of Internal Medicine, 17th Edition, Page 2588.