This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'Following are features of Barrett&;s oesophagus \nSelect and explain. \nA. Intestinal Metaplasia, B. Always gastric type of epithelium, C. Squamous carcinoma more common, D. Present as patchy or ring involvement', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Histologic changes of the distal oesophagal mucosa from its normal squamous epithelium to a columnar configuration (intestinal metaplasia). Barrett oesophagus in endoscopy appears as velvety-red "tongues" of mucosa that extend cephalad from the GEJ. These patients carry a higher risk to Adenocarcinoma oesophagus compared to normal population. Reference: Sabiston 20th edition page: 1074', 'role': 'assistant'}]