The famous iron pillar located near Qutab Minar in New Delhi is made up of which material?
(a) Stainless steel
(b) Malleable iron
(c) Mild steel
(d) Wrought iron
The question was asked during an online interview.
I would like to ask this question from Mold Materials in division Molding and Core Sands of Casting-Forming-Welding I