40th B.P.S.C. (Pre) 1995
Which statement of the following is true for igneous rocks?
aThese have very few fossils
bThey are porous to water
cThey are both crystal line and non-crystal line✓ Correct
dThese rocks do not contain silica
Explanation
Igneous rocks are formed when magma (inside the Earth) and lava (on the outer surface) cool and solidify. They do not have layers and fossils are also not found in them. They are both crystalline and non-crystalline.
general-science