Multiple choice

Directions: The following items consist of two statements, one labelled as Assertion (A) and the other labelled as Reason (R). You are to examine these two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so, whether the reason is a correct explanation of the Assertion. Select your answer to these items using the codes given below. Assertion (A) : Basalt is a fine-grained and dark coloured igneous rock which is formed below the earth`s surface. Reason (R) : The rate of cooling and solidification of magma inside the earth is very slow.

  1. Both A and R are true and R is the correct explanation of A.

  2. Both A and R are correct but R is not the correct explanation of A.

  3. A is true but R is false.

  4. A is false but R is true.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Assertion (A) states that basalt is a fine-grained, dark-colored igneous rock formed below the earth's surface. However, basalt is an extrusive (volcanic) igneous rock formed on or very close to the earth's surface through the rapid cooling of lava, not magma inside the earth. Thus, Assertion (A) is false, making option D correct.

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