This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Otosclerosis, Subject name: ENT
[{'content': "Schwartz s sign is seen in: \nSelect and explain. \nA. Otosclerosis, B. Meniere's disease, C. Retrocochlear lesion, D. None", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (a) OtosclerosisRef: Dhingra 5th Ed. /. 461, 98-99* Schwartz sign is a pink reflex, seen through intact tympanic membrane, in the area of oval window. It indicates active otosclerosis usually during pregnancy.* Otosclerosis is an abnormal bone growth in the middle ear that causes hearing loss.Symptoms* Hearing loss* Paracusis willi: An otosclerotic patient hears better in noisy surrounding.* Tinnitus* Vertigo* SpeechSigns* Schwartz's sign: A reddish hue seen on the promontory through the tympanic membrane. This is indicative of active focus with increased vascularity.* Pure tone audiometry shows loss of air conduction, more for lower frequencies* Carhart's notch: there is a sudden dip at 2000 Hz in bone conduction curve.Also Know* Don't get confused between schwartz sign and Schwartz surgery.* Schwartz surgey is a simple mastoidectomy or cortical mastoidectomy in case of mastoiditis.", 'role': 'assistant'}]