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
An Afroamerican boy DI car ui age presented with abdominal pain, chronic hemolysis and abnormal RBC shape on peripheral smear. Most likely disorder responsible for this condition: 
Select and explain. 
A. Point mutation, B. Trinucleotide repeat, C. Antibody against RBC membrane, D. Genomic imprinting
A: Point mutation
Answer: A: Point mutation 
Explanation: Ans. a. Point mutation