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Namratha from JGRVK, Bengaluru

Subject :ICSO Class : Class 4

first type of optical disc

Ans 1:

Udayan Sindhu Chaudhuri from Bluebells School International , New Delhi

Class : Class 9

floppy disc

Merina James from Doha Modern Indian School, Doha

Class : Class 8

A Compact Disk