The idea of froth floatation method came from a person \( \mathrm{X...

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The idea of froth floatation method came from a person \( \mathrm{X} \) and this method is related to the process \( \mathrm{Y} \) of ores. \( \mathrm{X} \)
P and \( Y \), respectively, are :
[JEE Main 2019]
W
(1) fisher woman and concentration
(2) washer man and reduction
(3) washer woman and concentration
(4) fisher man and reduction
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