Out of the following, the ________________ pipe has the least corrosion resistance?

Out of the following, the ________________ pipe has the least corrosio

1.	Out of the following, the ________________ pipe has the least corrosion resistance?
A.	Mild steel
B.	Copper
C.	Cast iron
D.	Wrought iron
Answer» E.

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Out of the following, the ________________ pipe has the least corrosion resistance?

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