This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Medicine
[{'content': '1772. A patient presents with macroglossla and loss of tongue papilla. His Hb Is 11.5 and MCV Is 100. What shuld be the next step In investigating this patient ? \nSelect and explain. \nA. B12 estimation, B. Brush biopsy of the lesion, C. Fluconazole treatment, D. Incision biopsy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Question repeated .', 'role': 'assistant'}]