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3. Which of the following is an input device?

(i) (ii)

(iii) (iv)

B. State whether these statements are true or false.

1. Working of a computer is called processing.

2. CPU stands for Centre Processing Unit.

3. Printer is an output device.

C. Write I for input device, O for output device and P for processing device.

1. 2.

3. 4.

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