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QusWhat type of sensor is typically used in smartwatches to measure heart rate? Qusहृदय गति मापने के लिए स्मार्टवॉच में आमतौर पर किस प्रकार के सेंसर का उपयोग किया जाता है?
A. Optical sensor
B. Gyroscope
C. Infrared sensor
D. Pressure sensor
Solution
A. Optical sensor
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