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Which of the following properties will be the meaningful indicator/indicators of uniform rate of elongation of a test piece of a structural material before necking happens in the test piece?    

         1. Ductility

         2. Toughness

         3. Hardness

         Select the correct answer using the code given below.

         (a) 1 only                        (b) 2 only

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

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