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