Arrange the following substances in their order of increasing hardness:GypsumTopazFluoriteFeldsparSelect the correct answer using the code given below:

Arrange the following substances in their order of increasing hardness

1.	Arrange the following substances in their order of increasing hardness:GypsumTopazFluoriteFeldsparSelect the correct answer using the code given below:
A.	4-3-2-1
B.	1-3-4-2
C.	3-4-2-1
D.	1-4-3-2
Answer» C. 3-4-2-1