A thin film transistor (TFT) is a/an.

a. electronic switch used on FPDs
b. electronic device used in CR
c. cassettes diode used in rectifiers
d. electronics used with AECs

Option a electronic switch used on FPDs

Explanation:

A thin film transistor (TFT) is an electronic switch which is commonly used in a liquid crystal display (LCD). TFT derives its name by the way how it is produced. It is produced by layering thin films of semiconductor.  TFT is a type of transistor which is used to control state every  individual pixel in a LCD. TCT can change the states of pixels (on and off) very quickly.

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?