The pair of compounds that can exist together is
-
FeCl3.SnCl2
-
HgCl2,SnCl2
-
FeCl2,SnCl2
-
FeCl3,KI
C.
FeCl2,SnCl2
The compounds with lower oxidation number and which cannot reduce by one another can exist together. Thus, FeCl2 and SnCl2 can exist together as Fe2+ can not be reduced by Sn2+.