This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: ENT
[{'content': 'Most common presentation of nasopharyngeal carcinoma. \nSelect and explain. \nA. Neck lymph node, B. Blockage of nose, C. Loss of smell, D. Blood tinged discharge', 'role': 'user'}, {'content': "Answer: A \nExplanation: Painless cervical lymphadenopathyis the most common presenting feature of nasopharyngeal carcinoma. Presence ofunilateral serous otitis media in an adult should raise suspicion of nasopharyngeal growth. (Eustachian tube obstruction leads to serous otitis media which causes deafness). Commonest site of origin for nasopharyngeal carcinoma is thefossa of Rosenmuller. EXTRA EDGE: Nasopharyngeal cancer can causeTrotter's triadof Conductive deafness(eustachian tube blockage), Ipsilateral temporoparietal neuralgia (involvement ofCN V) and Palatal paralysis (CN X)", 'role': 'assistant'}]