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DIRECTIONS: Consider the following statements and select the correct answer with the help of codes given below:
Assertion (A): Granite has larger crystals than basalt.
Reason (R): Basalt has larger content of metallic minerals.
Both A and R are true and R Explains A
Both A and R are true but R does not explain A
A is true but R is false
A is false but R is true
The crystal size in the igneous rocks is more a function of the quickness of the process of cooling rather than of the mineral content. The mineral content determines the melting point of the rocks and the basaltic lava having a higher content of metallic minerals solidifies rapidly once it reaches the surface.
By: Parvesh Mehta ProfileResourcesReport error
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