E) None of these
Correct Answer: C
Solution :A compact disc is a plastic fabricated. Circular medium made of molded polymer for electronically recording storing and playing back audio, video, text and other information in digital form- It contains data permanently. i.e. data doesn't get lost when there is no power. Also, compact disc is an optical device which uses reflecting surfaces and laser technology to read and write data on a disk. Different versions of compact disc are CD-ROM, CD-R ,CD-RW. DVD. etc.
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