state gov MP Forest Guard and Jail Prahari Mock Test 2023 General Science Physics Optics

Which of the following comparisons of material medium and its refractive index is correct?

1
Sapphire < Fused quartz < Canada Balsam < Alcohol
2
Alcohol < Fused quartz < Canada Balsam < Sapphire
3
Alcohol < Canada Balsam < Sapphire < Fused quartz
4
Canada Balsam < Fused quartz < Alcohol < Sapphire
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