This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fundamentals In Radiology, Subject name: Radiology
Wavelength of light is 
Select and explain. 
A. 400-700 nm, B. 500-800 nm, C. 700-900 nm, D. 300-600 nm
A: 400-700 nm
Answer: A: 400-700 nm 
Explanation: Ans: a (400-700nm) Ref: Vasudevan 4th ed p. 479Wavelength of visible light is 400-700nm.Violet- 420 nmBlue- 470 nmGreen- 520 nmYellow- 580 nmRed- 680 nm