The coefficient for Br and OH has been 3 and 6 respectively. Thus option C is correct.
If the reaction takes place in a basic medium, the reaction can be given as:
[tex]\rm Br_2\;+\;OH^-\;\rightarrow\;BrO_3^-\;+\;Br\;+H_2O[/tex]
The coefficient has been placed in the chemical reaction to balance the number of atoms on the product and the reactant side.
The number of atoms of Br on the product side has been 2, and the reactant side has been 2.
The oxygen atoms have been 1 on the reactant side, and 3 on the product side.
It has been balanced as:
[tex]\rm 3\;Br_2\;+\;6\;OH^-\;\rightarrow\;BrO_3^-\;+\;5\;Br^-\;+\;3\;H_2O[/tex]
The coefficient for Br and OH has been 3 and 6 respectively. Thus option C is correct.
For more information about redox reaction, refer to the link:
https://brainly.com/question/13978139
