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18-4-1 high speed steel contains 18%, 4% and 1% respectively of____________________?

18-4-1 high speed steel contains 18%, 4% and 1% respectively of____________________?

A. Tungsten, vanadium and chromium
B. Tungsten, chromium and vanadium
C. Vanadium, chromium and tungsten
D. Chromium, tungsten and vanadium