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प्रश्न
Assertion (A): Extinct volcanoes have not shown any activity for a long historic period.
Reason (R): The vent of these volcanoes have got closed with a plug.
पर्याय
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
MCQ
विधान आणि तर्क
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उत्तर
Both A and R are true and R is the correct reason for A.
Explanation:
Extinct volcanoes have not shown any activity for a long historic period (A) because their vents have got closed with a plug (R). This plug blocks the escape of magma and gases, thus stopping any further volcanic activity, making the volcano extinct.
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