question_answer

         Consider the following statements: When a metal or alloy is cold worked:                       

(1) It is worked below room temperature.

(2) It is worked below recrystallization temperature.

(3) Its hardness and strength increase.

(4) Its hardness increases but strength does

Of these statements:                      

A) 1 and 4 are correct                    

B) 1 and 3 are correct                     

C) 2 and 3 are correct                   

D) 2 and 4 are correct.