# 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.