This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
. Red cones in fovea are sensitive to which wavelength 
Select and explain. 
A. 460nm, B. 480nm, C. 520nm, D. 560nm
D: 560nm
Answer: D: 560nm 
Explanation: It will be evident that only one of three types of color pigments is present in each of different cones, thus making cones selectively sensitive to different colors: blue, green or red. These color pigments are called respectively blue sensitive pigment, green sensitive pigment, and red sensitive pigment. The absorption characteristic of the pigments in the three types of cones shows peak absorbencies at light wavelength of 445, 535 and 570 nm, respectivelyRef: Guyton & Hall Textbook of medical physiology- a south Indian edition 2014 pg no:747