Geography · Geomorphology and Petrology
Assertion [A]: Obsidian is a natural volcanic glass rock. Reason [R]: Rapid cooling and solidification of lava or magma prevents crystal growth, resulting in a glassy texture. Select the correct code:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1[A] is false, but [R] is true
- 2[A] is true, but [R] is false
- 3Both [A] and [R] are true, but [R] is NOT the correct explanation of [A]
- 4Both [A] and [R] are true, and [R] is the correct explanation of [A]✓
Correct answer
Both [A] and [R] are true, and [R] is the correct explanation of [A]
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