The electrical conductivity of a ______________ decreases with rise in temperature?

A. Wrought iron
B. Cast iron
C. Mild steel
D. High carbon steel

A. Chemical
B. Electrochemical
C. Both A. & B.
D. Neither A. nor B.

A. Alloying
B. Galvanising
C. Utensil manufacture
D. Electrical industry

A. Silicon steel
B. Chromium steel
C. Molybdenum steel
D. None of these