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: Orthopaedics
[{'content': "De-Quervain's disease classically affects the - \nSelect and explain. \nA. Flexor pollicis longus and brevis, B. Extensor carpi radialis and extensor pollicis longus, C. Abductor pollicis longus and brevis, D. Extensor pollicis brevis and abductor pollicis longus", 'role': 'user'}, {'content': "Answer: D \nExplanation: De-Quervian's tenovaginitis is characterized by pain over the styloid process of the radius and palpable thickening in the course of the abductor pollicis longus and extensor pollicis brevis tendons.", 'role': 'assistant'}]