A) Only (1)
B) Only (2)
C) Both (1) and (2)
D) Both (1) and (3)
Correct Answer: B
Solution :Trackball is used to control the cursor. Microphone is used to enter audio data and headphone is used to listen to audio data. So, from the given options, only option (2) can be used to feed audio data in a computer.
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