Which alloy has the highest mole fraction of chromium? a. WI-52 (21%Cr,63%Co,2.0%Fe,11%W,2%Nb,0.25%Mn,0.25%Si,0.5% C). b. Inconel 600(15.3%Cr,76%Ni,8%Fe,0.5%Mn,0.2%Si). c. A-286 (15\% Cr, 26%Ni,54%Fe,2%Ti,1.3%Mo,1.3%Mn,0.4%Si)