# 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.