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
Subtelomeric fraction in children with idiopathic MR can be traced by all, except? 
Select and explain. 
A. FISH, B. Laser diode index, C. MALDI, D. Array comparative genomic hybridization
B: Laser diode index
Answer: B: Laser diode index 
Explanation: . Laser diode index