# Matte contains

$(a)\;Cu_2S,Feo\;and\;Silica \\(b)\;Cu_2S,Fes\;and\;Silica \\(c)\;Cu_2S,Cu_2O\;and\;Silica \\ (d)\;Cu_2S\;and\;Cuo,Silica$

$Cu_2S,Fes\;and\;Silica$ is correct.
Hence b is the correct answer.