This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: Surgery
[{'content': 'Schatzki ring is seen at \nSelect and explain. \nA. Mid- oesophagus, B. Lower - oesophagus, C. Junction of lower oesophagus, D. None', 'role': 'user'}, {'content': "Answer: C \nExplanation: C. i.e. (Junction of lower oesophagus) (1042 - B & L 25th) (814. S. Das 5th)SCHATZKI'S RING - It is an oesophageal web contains only mucosa and submucosa. Actually appears at the squamo- columnar junction with 1 to 2 cm above the oesophago gastric junction* Usually associated with sliding hiatus hernia* Intermittent oesophageal bougienage is the treatment of choice* RANULA is retension cyst of minor salivary glands*** Most common tumor of the minor salivary gland is - Adenoid cystic carcinoma**", 'role': 'assistant'}]