Which of the following properties are affected due to addition of carbon and manganese to steel?
(i) tensile strength and yield property
(ii) Ductility
(iii) Welding
(iv) Corrosion resistance
a) i and ii only
b) i and iii only
c) i, ii, iii
d) i and iv only

Answer: c
Explanation: Increased quantity of carbon and manganese imparts higher tensile strength and yield properties but lowers ductility which is more difficult to weld.