4) The right sequence of sulfide ore minerals according to their increasing order of reflectance
is
a) Galena, pyrite, sphalerite, Pyrrhotite
b) Sphalerite, galena, pyrrhotite, pyrite
c) Sphalerite, pyrrhotite, galena, Pyrite
d) Pyrrhotite, Sphalerite, pyrite, galena
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c option
sphalerite 'pyrrhotite 'galena 'pyrite
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