In MS-DOS 5.0, which is the number that acts as a code to uniquely identify the software product?

In MS-DOS 5.0, which is the number that acts as a code to uniquely ide

1.	In MS-DOS 5.0, which is the number that acts as a code to uniquely identify the software product?
A.	MS
B.	DOS
C.	MS DOS
D.	5
Answer» E.