This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerve supply of Lower Limb, Subject name: Anatomy
Which of the following may occur in common peroneal nerve injury - 
Select and explain. 
A. Loss of plantar flexion, B. Foot drop, C. Loss of sensation over sole, D. Inversion of foot affected
B: Foot drop
Answer: B: Foot drop 
Explanation: Common peroneal nerve is commonest nerve to be paralysed . Can be injury due to fracture neck of fibula, lathi injury on lateral side of knee joint, due to plaster on leg. Effect of injury: Motor loss i.e. Foot drop (loss of dorsiflexion or extension) Sensory loss at back and lateral side of leg, most of dorsum of foot. Paralysis of anterior compament muscles of leg Loss of foot eversion Sole is supplied by the branches (medial & lateral plantar nerve) of posterior tibial nerve.