Which of the following are true with regard to igneous rocks? I. the y are formed inside the earth, under great pressure II. they do not occur in layers III. they are mostly crystalline in nature IV. they contain fossils

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Which of the following are true with regard to igneous rocks? I. the y are formed inside the earth, under great pressure II. they do not occur in layers III. they are mostly crystalline in nature IV. they contain fossils