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: Pathology
In Hereditary spherocytosis an inherited abnormality is seen in which of the following red blood cell component - 
Select and explain. 
A. A-globin chain, B. a-globin chain, C. Phosphatidylinositol glycan A, D. Spectrin
D: Spectrin
Answer: D: Spectrin 
Explanation: Ideal answer is ankyrin (most commonly) but in the given options, spectrin is the best option.