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: Pediatrics
Which among the following is not an autoimmune disease 
Select and explain. 
A. Myasthenia gravis, B. Systemic lupus erythematosus, C. Sickle cell disease, D. graves diesease
C: Sickle cell disease
Answer: C: Sickle cell disease 
Explanation: Sickle cell disease is a genetic condition which is characterized by mutation in beta globin chain of hemoglobin (glutamic acid is replaced with valine in the 6th position of beta chain).
• Other given choices like SLE, Graves and MG are all autoimmune conditions