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
Banding is: 
Select and explain. 
A. Method of detecting single gene deletion, B. Fluoroscene filters are used, C. Y-chromosome is seen in interphase, D. Trypsin and Giemsa are used
A: Method of detecting single gene deletion
Answer: A: Method of detecting single gene deletion 
Explanation: Method of detecting single gene deletion