Which one of the following reactions do not show disproportionation phenomena?
Cl2(g)+2OH−(aq)→ClO−(aq)+Cl−(aq)+H2O(I)
Br2(I)+2OH−(aq)→BrO−(aq)+Br−(aq)+H2O(I)
I2(s)+2OH−(aq)→IO−(aq)+I−(aq)+H2O(I)
2F2(g)+2OH−(aq)→2F−(aq)+OF2(g)+H2O(l)
Among halogens, fluorine does not show disproportionation tendency.