The full form of LED is

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Q: 21 (NDA-II/2018)
The full form of LED is

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,41,8,41,5,1,2

keywords: 

{'led': [0, 0, 0, 1], 'light enhancing devise': [0, 0, 0, 1], 'light emitting devise': [0, 0, 0, 1], 'light enhancing diode': [0, 0, 0, 1], 'light emitting diode': [0, 0, 0, 3], 'full form': [4, 0, 0, 3]}

The correct answer to the question is option 1: Light Emitting Diode.

An LED is a semiconductor device that emits light when an electric current passes through it. It is a type of solid-state lighting technology, which means it does not contain any moving parts or filaments like traditional incandescent bulbs.

Let`s analyze the other options to understand why they are incorrect:

Option 2: Light Emitting Devise - This option contains a spelling mistake. The correct term is "device," not "devise." Therefore, this option is incorrect.

Option 3: Light Enhancing Devise - This option does not accurately reflect the function or purpose of an LED. LEDs do not enhance light; they emit light. Therefore, this option is incorrect.

Option 4: Light Enhancing Diode - Similar to option 3, this option suggests that LEDs enhance light, which is not accurate. Therefore, this option is incorrect.

In summary, the full form of LED is Light Emitting Diode. It is a semiconductor device that emits light when an electric current passes through it.

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