This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
In radial nerve injures paralysis of the brachioradialis, extensor carpi radialis longus and brevis, extensor digitorum and extensor pollicis longus but sparing of the triceps places the nerve lesion at 
Select and explain. 
A. The level of the elbow, B. The level of the humeral shaft (mid), C. Avulsion at the nerve root level, D. The level of the brachial plexus
B: The level of the humeral shaft (mid)
Answer: B: The level of the humeral shaft (mid) 
Explanation: The level of the humeral shaft (mid) Nerve supply to the triceps is proximal to the mid shaft level