Law obeyed by Pulse Oximeter is _______

• A. Lambert-Bouguer law
• B. Beer ‚Äö√Ñ√∂‚àö√ë‚àö‚â§s law
• C. Beer-Lambert law
• D. Lamber-Bouguer, Beer‚Äö√Ñ√∂‚àö√ë‚àö¬•s and Beer-Lambert Law