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25-05-2023
Engineering

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Which one of the following is the most appropriate explanation of photoplethysmography?
a. Measuring heart rate by tracking changes in green light absorption, since human blood absorbs green light
b. Measuring blood pressure by tracking changes in infrared light absorption, since human blood absorbs infrared light
c. Measuring heart rate by tracking changes in UV light absorption, since human blood absorbs UV light
d. Measuring blood pressure by tracking changes in green light absorption, since human blood absorbs green light

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