This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': 'Which of the following cancer can cause referred otalgia i.e. Referred pain in the Ear? \nSelect and explain. \nA. Ca larynx, B. Ca pharynx, C. Ca oral cavity, D. All of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Oropharyngeal cancer, most being squamous cell cancer, is one of the most worrisome entities producingpain referred to the ear Ref ganong's review of medical physiology 25e 651", 'role': 'assistant'}]