(a) Sedimentary rocks
(b) Metamorphic rocks
(c) Igneous rocks
(d) None of these
Ans :- (c) Igneous rocks

Explanation :-
Rock that are formed due to cooling of molten magma or lava, they are un-stratified

• They have crystalline and compact grain structure
• Eg. : Granite, Basalt
• They mainly composed of Si, O, Al, Fe, Mg, Na etc.