Correct Option: A

A floppy disk is a thin magnetic-coated disk contained in a flexible or semi-rigid protective jacket. Data is stored in tracks and sectors. The floppy disks are usually 3.5" in size. However, older floppy disks may be in use; these would be 5.25" in size. Double sided high density 3.5" disks can hold 1.44 Mb of data.