The idea of froth floatation method came from a person

Question:

The idea of froth floatation method came from a person $X$ and this method is related to the process $Y$ of ores. $X$ and $Y$, respectively, are:

  1. fisher woman and concentration

  2. washer man and reduction

  3. washer woman and concentration

  4. fisher man and reduction


Correct Option: , 3

Solution:

The idea of froth floatation method came from washerwoman and this process is related to concentration of sulphide ores.

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