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