If in the given reaction ,3I2 + OH^- to ...

If in the given reaction ,`3I_2 + OH^- to IO_3^- + 5I^- 2` moles of iodine are taken, then the ratio of iodate and iodide ions formed in the alkaline medium is

1 : 5

3 : 5

5 : 1

5 : 3

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