Assertion (A): Cold working of metals results in increase

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Assertion (A): Cold working of metals results in increase of strength and hardness.
Reason (R): Cold working reduce the total number of dislocations per unit volume of the material

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not a correct explanation of A
3. A is true but R is false
4. A is false but R is true

Correct Option: C

A is true but R is false