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Standard XII
Logical Reasoning
Question

Assertion (A) : Diamond is used for cutting glass.
Reason (R) : Diamond has a high refractive index.
  1. Both A and R are true but R is NOT the correct explanation of A.
  2. Both A and R are true and R is the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.

A
Both A and R are true but R is NOT the correct explanation of A.
B
A is true but R is false.
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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Solution
Verified by Toppr

The correct option is B Both A and R are true but R is NOT the correct explanation of A.
Diamond is very hard due to its rigid three dimensional structure and so, it is used for cutting glass. Refractive index of diamond is high and gives it the greater transparency and brilliance.
Hence, option B is correct.

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