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(A): Diamond is an insulator and graphit...

(A): Diamond is an insulator and graphite is a conductor.
(R): Diamond is used as abrasive and graphite as lubricant. 

A

Both A and R are true, R properly explains A.

B

Both A and R are true, R does not explain A.

C

A is true, but R is false.

D

A is false, but R is true.

Text Solution

Verified by Experts

The correct Answer is:
B
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