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
Chromosomes are visualized through light microscope with resolution of: 
Select and explain. 
A. 5 kb, B. 50 mb, C. 5 mb, D. 500 kb
C: 5 mb
Answer: C: 5 mb 
Explanation: Chromosomes are visualized through light microscope with resolution of 5 mb.Karyotype analysis:Organize all chromosomes by homology, size and shape.Provide an overview of the whole genome.Detect both numerical and structural chromosomal aberrations (overall resolution is 5 Mega bases (Mb); breakpoint resolution is 5 to 15 Mb).