in use of speacial alloys, alloying of Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â with iron increase corrosion resitance

in use of speacial alloys, alloying of Â Â Â Â Â Â Â Â

1.	in use of speacial alloys, alloying of Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â with iron increase corrosion resitance
A.	cr
B.	ni
C.	both a and b
D.	tin
Answer» D. tin