This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharynx, Subject name: ENT
[{'content': "Trotter's triad is seen in \nSelect and explain. \nA. Nasopharyngeal carcinoma, B. Maxillary sinusitis, C. Maxillary carcinoma, D. Angiofibroma", 'role': 'user'}, {'content': "Answer: A \nExplanation: Nasopharyngeal cancer can cause conductive deafness (eustachian tube blockage), ipsilateral temporoparietal neuralgia (involvement of CN V) and palatal paralysis (CN X)-- collectively called Trotter's triad. (Ref: Diseases of Ear, Nose and Throat, PL Dhingra, 7th edition, page 285)", 'role': 'assistant'}]