Question

Given below are two statements:
Assertion (A): Many natural disasters are caused by the volcanic activity occurring in the island arc systems.
Reason (R): The fissure type volcanism causes the erupted lava to spread over wide areas.

• A. Both A and R are correct and R is the correct explanation of A
• B. Both A and R are correct but R is not the correct explanation of A
• C. A is correct but R is not correct
• D. A is not correct but R is correct

Hint:

Both statements may be true, but in assertion-reason questions, the reason must directly explain the assertion.

Answer 1

The Correct Option is B

Concept:
Island arcs are associated with subduction zones and active volcanism. Fissure volcanism is a different style of volcanic eruption.

Step 1: Check Assertion.
Island arc systems are volcanically active and may produce earthquakes, eruptions, tsunamis and other disasters. \[ A \text{ is correct} \]

Step 2: Check Reason.
Fissure eruptions allow lava to spread over wide areas. \[ R \text{ is correct} \]

Step 3: Check explanation.
Reason talks about fissure volcanism, but Assertion talks about volcanic disasters in island arcs. It does not directly explain the Assertion. \[ \therefore \text{Correct Answer is (B)} \]