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: Biochemistry
Which method is used for reading large chromosomes 50-100 base pairs: 
Select and explain. 
A. RFLP, B. Chromosome walking, C. PCR, D. None of the above
A: RFLP
Answer: A: RFLP 
Explanation: RFLP