a
lead and tin
b
iron and tin
c
lead and zinc
d
iron and zinc
Explanation
Correct Option
aVideo Explanation
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OG_Loc
2 years ago
i wish we could tag users ....
or edit comments and posts after sending them
or reply to a user under a particular comment like @stillnsk124 above 


comments of 8yrs ago showed that the app has less improvement except updating questions





