(a) Olivine
(b) Muscovite
(c) Dolomite
(d) Biotite
Ans :- (d) Biotite

Explanation :-
Black mica is also known as Biotite, a silicate mineral in the mica group. It is abundant in
metamorphic rock in pegmatite’s and also in granite and other intrusive igneous rock.
• White mica is called as “Muscovite”.