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Sajan sarthak Best Answer
olivine will crystallising so The (Mg2Sio4 ) so 2 Mg means more mg is getting crystallized and 1 SiO2 means less sio2 will form . then the residual melt will have low mg and high si02 then option c will be the answer
explain again.
Olivine is getting crystallized components are given that Mgo and SiO2 . So forstrite i.e Mg2Sio4 will form Then 2 mole mg will crystllise while 1 mole SiO2 will crystllise then that melt will have less mg and high si02 so the arrow will be from the high mg to low mg and low si to high si ( of that residual melt)