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) : Circum pacific belts accounts for major percentage share of world's total earthquakes of varying magnitude and deep focus. Reason (R) : Maximum occurrence of earthquakes along circum-pacific belt is caused by divergent motion of tectonic plates and consequent formation of faults.

  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
C Correct answer
Explanation

The assertion is correct - the Circum-Pacific Belt (Ring of Fire) accounts for most of the world's earthquakes. However, the reason is incorrect because this is caused by CONVERGENT plate motion (subduction), not divergent motion. Subduction zones create the deep-focus earthquakes and volcanic activity characteristic of this belt. Divergent boundaries create shallower earthquakes.

Keep practicing — related questions