Question on: WAEC Chemistry - 1990

In the reaction represented by the equation; 2FeCI3 + SO2 + 2H2O → 2FeCL2 + H2SO4 + 2HCI the oxidation number of sulphur changes from

A
+2 to + 6
B
+ 4 to + 6
C
0 to + 6
D
- 2 to + 4
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Correct Option: B

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