engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) General Science Physics

______ तंत्रज्ञान टीव्ही रिमोटमध्ये वापरले जाते.

1
LCD
2
अवरक्त प्रकाश 
3
जंबुलातीत किरण
4
जंबुलातीत किरण आणि LCD
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