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QusWhich sensor is used to measure CO2 levels in a smart greenhouse? Qusस्मार्ट ग्रीनहाउस में CO2 के लेवल को मापने के लिए किस सेंसर का यूज़ किया जाता है?

A. Gas sensor
B. Humidity sensor
C. Soil moisture sensor
D. PIR sensor


Solution
A. Gas sensor



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