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Directions: Questions No. 63 are based on the following paragraph. When ammonium vanadate is heated with oxalic add solution, a compound Z is formed. A sample of Z was titrated with\[KMn{{O}_{4}}\] solution in hot acidic solution. The resulting liquid was reduced with \[S{{O}_{2}}\], the excess \[S{{O}_{2}}\]boiled off, and the liquid again titrated with \[KMn{{O}_{4}}\]. The ratio of the volumes of \[KMn{{O}_{4}}\] used in the two titrations was 5 : 1. \[KMn{{O}_{4}}\] oxidises all oxidation state of vanadium to Vanadium (+V) and \[S{{O}_{2}}\] reduces vanadium (+V) to vanadium (+IV). Read the above experiment and answer the following questions. If vanadium exists as \[VO_{4}^{3-}\], reduced species by\[S{{O}_{2}}\] would be

A) \[VO_{4}^{2-}\]                                               

B) \[VO_{3}^{2-}\]

C) \[VO_{2}^{2-}\]                                               

D) \[VO_{{}}^{2-}\]