This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bony dysplasia and soft tissue affection, 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 Quervain&;s tenosynovitis results from inflammation of common sheath of abductor pollicis longus and extensor pollicis brevis tendons. Finkelstein&;s test can be done in this case Reference - Essential ohopaedics-Maheshwari-5th edn-pg no 303', 'role': 'assistant'}]