Which type of scan is used on the eye to measure the layer of blood vessels?
A.
Facial recognition scan
B.
Retinal scan
C.
Iris scan
D.
Signature kinetics scan
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B
The answer id B
The answer is wrong, the correct is Iris Recognition
Iris is about eye colour.
Blood vessels are in the retina
http://en.wikipedia.org/wiki/Retina