Ans: (b) upper melting point curve
Liquidus is the line above which everything will be in liquid phase. In solid solution curve, the last melting will occur at the liquidus and he...
Liquidus is curve which represents the locus of points representing the melting of last remaining solid in the solid solution series during heating. In other way round (during cool...
liquidus is the upper first freezing point or upper melting point curve so if it is a msq it will have Answer B and C .
but if it is a mCq the most appropriate will be C.
just be...