This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
[{'content': 'Tendon absent in palm is? \nSelect and explain. \nA. Extensor pollicis brevis, B. Flexor digitorun superficialis, C. Flexor digitorum profundus, D. Opponens pollicis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Extensor pollicis Brevis originates from the Posterior surface of shaft of radius Inses to the base of proximal phalanx of the thumb. Reference page no-135 , BD chaurasia , 6th edition- upper limb& thorax', 'role': 'assistant'}]