Question

which is of two Florine and iodine show both positive and negative oxidation States

Answer 1

flourine shows both positive and negative oxidation states

Answer 2

Fluorine is the most electronegative element and has oxidation state only -1.

It does not have positive oxidation state. While other halogens exhibits positive oxidation states including iodine which shows (+7, +5, +3, +1, -1) oxidation states with electronic configuration (4d10 5p5)