Marble is a metamorphosed
A. basalt
B. granite
C. gabbro
D. limestone
CORRECT ANSWER: D. limestone
EXPLANATION: “Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form.” Examples are Granite– Gneiss, Limestone–Marble, Coal–Graphite, Sandstone– Quartzite, Coal– Slate etc.

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