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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Dinesh khalmaniya 1 Best Answer
https://doubtnut.com/question-answer-chemistry/in-aluminium-extraction-by-bayer-process-alumina-is-extracted-from-bauxite-by-sodium-hydroxide-at-hi-23689900
In this link ans is (d)
wait
option C is correct. this link I've sent you to clear concept. check the solution below this video, where A and B is given but down it option D is incorrect. please ignore it.