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Question

Assertion :The spheres x2+y2+z2=64 & x2+y2+z212x+4y6z+48=0 touch externally Reason: The distance between the centres of spheres is equal to the sum of their radii

A
Both Assertion & Reason are individually true & Reason is correct explanation of Assertion
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B
Both Assertion & Reason are individually true but Reason is not the ,correct (proper) explanation of Assertion
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C
Assertion is true but Reason is false
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D
Assertion is false but Reason is true
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Solution

The correct option is D Assertion is false but Reason is true
Assertion given is The spheres x2+y2+z2=64
x2+y2+z212x+4y6z+48=0 touch externally
hence Assertion is false
Reason given is the distance between the centres of spheres is equal to the sum of their radii.
hence Assertion is false but Reason is true.

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