एलईडी के सम्बन्ध में निम्नलिखित कथन पढ़िए और सही विकल्प चुनिए Read the following statements about LEDs and choose a correct option.

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एलईडी के सम्बन्ध में निम्नलिखित कथन पढ़िए और सही विकल्प चुनिए Read the following statements about LEDs and choose a correct option.