This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral cavity & Oesophagus, Subject name: ENT
[{'content': 'The location of schatzki&;s ring is \nSelect and explain. \nA. Lower end of pharynx, B. Upper end of esophagus, C. Lower end of esophagus, D. Antrum of stomach', 'role': 'user'}, {'content': "Answer: C \nExplanation: SCHATZKI'S RING It occurs at the junction of squamous and columnar epithelium at the lower end of oesophagus and has also been called lower oesophageal ring. Usually seen in patients above 50 years of age. Cause is unknown. Symptomatic patients complain of intermittent dysphagia and some may even present with bolus obstruction. It may be associated with hiatus hernia. Treatment is oesophageal dilatation. Ref:- Dhingra; pg num:-345", 'role': 'assistant'}]