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
Which defect in RBC is shown below? 
Select and explain. 
A. Cabot ring, B. Basophilic stippling, C. Heinz bodies, D. Toxic granules
A: Cabot ring
Answer: A: Cabot ring 
Explanation: Ans. (a)Cabot ring