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: ENT
[{'content': "Pain in tonsillar fossa and upper neck is characteristic of? \nSelect and explain. \nA. Eagle's syndrome, B. Ape's syndrome, C. Sickler's syndrome, D. Usher's syndrome", 'role': 'user'}, {'content': "Answer: A \nExplanation: Eagle's syndrome is characterised by pain in tonsillar fossa and upper neck. Pain radiates of ipsilateral ear. There is aggravation of pain on swallowing. It is caused by calcification of stylohyoid ligament / elongation of styloid process. Ref: Diseases of Ear, Nose and Throat by P.L. Dhingra, 9th edition, p287.", 'role': 'assistant'}]