This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower Extremity, Subject name: Anatomy
[{'content': 'Fabella is present in: \nSelect and explain. \nA. Medial head of gastrocnemius, B. Lateral head of gastrocnemius, C. Adductor magnus, D. Adductor longus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B Lateral head of gastrocnemiusRef: Kulkarni Clinical Anatomy, 2nd ed. pg. 580* Fabella is a small sesamoid bone present in tendon of origin of lateral head of gastrocnemius.', 'role': 'assistant'}]