This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'Which defect in RBC is shown below? \nSelect and explain. \nA. Cabot ring, B. Basophilic stippling, C. Heinz bodies, D. Toxic granules', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a)Cabot ring', 'role': 'assistant'}]