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Consider the following statements about medium carbon steel:                 

1.   It can be quench-hardened but not case-hardened.

2.   It cannot be quench-hardened but casehardening can be done.

3.   It exhibits distinct yield point under tension test

Which of the following statements given above are correct?

(a) 1 and 2                      (b) 2 and 3

(c) 1 and 3                      (d) 1, 2 and 3

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