This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Limb and Lower Limb, Subject name: Anatomy
All of the following are the contents of second layer of sole except:- 
Select and explain. 
A. Flexor hallucis longus, B. Flexor digitorum longus, C. Flexor digitorum accessorius, D. Flexor hallucis brevis
D: Flexor hallucis brevis
Answer: D: Flexor hallucis brevis 
Explanation: Second layer of sole consist of two extrinsic tendons flexor hallucis longus & flexor digitorum longus and two intrinsic muscles flexor digitorum accessorius & four lumbricals. Flexor hallucis brevis is the muscle of third layer.