Question: What subset of Unicode is used by Windows?

Is "Other standardized subsets of Unicode include the Multilingual European Subsets: MES-1 (Latin scripts only, 335 characters), MES-2 (Latin, Greek and Cyrillic 1062 characters) and MES-3A & MES-3B (two larger subsets, not shown here)." the correct answer?
OPT: (A). yes. (B). no.
(B).