Assertion (A): Intrusive rocks have a coarser texture than extrusive rocks.

Reason (R): Intrusive rocks cool rapidly, allowing smaller crystals to form.

1
Both A and R are true, and R is the correct explanation of A.
2
Both A and R are true, but R is not the correct explanation of A.
3
A is true, but R is false.
4
A is false, and R is true

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