MS-DOS is a
Verified Answer
A. Disk operating system
B. Disk operating system
C. Disk operating system
D. Disk operating system
E. None of these
Explanation:
MS-DOS stands for Microsoft Disk Operating System. It was a command-line operating system dominant for IBM PC compatible computers. All options (A, B, C, D) correctly state 'Disk operating system', making any of them correct. The first option (A) is chosen as the correct index.