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
[{'content': 'Not a muscle of Ist layer of foot \nSelect and explain. \nA. Flexor digitorum brevis, B. Abductor Hallucis, C. Abductor digiti minimi, D. Flexor digitorum accessorius', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Flexor digitorum accessorius is a muscle of 2nd layer of foot', 'role': 'assistant'}]