(a) Igneous rocks
(b) Metamorphic rocks
(c) Sedimentary rocks
(d) Foliated rocks
Ans :- (b) Metamorphic rocks

Explanation :-
Metamorphic rocks – Metamorphic rocks are formed igneous or sedimentary rocks as a result of the action of the earth movement, temperature changes, liquid pressure etc.
• The resultant mass may have a foliated structure
Exp. Marble, Gneiss, quartzite, slate, schist, serpentine etc.
• Non-foliated structure, e.g. Marble.