The idea of froth floatation method came from a person X

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 woman and concentration

  3. fisher man and reduction

  4. washer man and reduction


Correct Option: , 2

Solution:

Froth floatation was discovered by washer women. It is a method of concentration of ores.

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