Answer:
b. diamond
Explanation:
Diamond is the hardest known naturally occurring substance. And it will scratch any other minerals below it on the moh's scale of hardness.
- Fluorite is below diamond in the scale of hardness and it will readily scratch it.
- Talc, is the softest mineral, it will not scratch fluorite
- Both gypsum and calcite also below fluorite.
- They will not scratch this mineral.
