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Which of the following is true? (a)Monolithic IC amplifiers are directly coupled or dc amplifiers

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Which of the following is true?

(a) Monolithic IC amplifiers are directly coupled or dc amplifiers

(b) Televisions and radios use tuned amplifiers

(c) Audio amplifiers have coupling capacitor amplifier

(d) All of the mentioned

I had been asked this question in an interview for internship.

Query is from Frequency Response of Amplifier in section Signals and Amplifiers of Electronic Devices & Circuits

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The correct choice is (d) All of the mentioned

For explanation: These all are practical applications of different types of amplifiers.

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