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Assertion A : Sharp glass edge becomes s...

Assertion A : Sharp glass edge becomes smooth on heating it upto its melting point.
Reason R : The viscosity of glass decreases on melting.
Choose the most appropriate answer from the options given below.

A

A is true but R is false

B

Both A and R are true but R is NOT the correct explanation of A.

C

A is false but R is true.

D

Both A and R are true and R is the correct explanation of A.

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