Q: 34 (CAPF/2016)

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Arrange the following substances in their order of increasing hardness:
1. Gypsum
2. Topaz
3. Fluorite
4. Feldspar
Select the correct answer using the code given below:
question_subject: 
Geography
question_year: 
2016
question_exam: 
CAPF
stats: 
0,160,552,200,248,104,160