Yes, because all helogen is can show sometime positive oxidation state exept flourine. and os is depend on other element.and flourine have highest electronegetivity 4.0 so it's only show negetive oxidation state.

Explanation:

Negative oxidation state:
The oxidation state of an element refers to the charge it would have if all the shared electrons in a compound were assigned to the more electronegative atom. In general, halogens tend to have a negative oxidation state when they form compounds.

Elements:
Let's analyze each element mentioned in the options:

a) Iodine:
Iodine (I) is a halogen and can exhibit both positive and negative oxidation states. It commonly shows oxidation states of -1, +1, +3, +5, and +7. Hence, it does not only show negative oxidation states.

b) Fluorine:
Fluorine (F) is the most electronegative element and usually shows only a negative oxidation state of -1. It readily accepts electrons to complete its octet and form the fluoride ion (F-). Therefore, fluorine is the correct answer as it shows only negative oxidation states.

c) Bromine:
Bromine (Br) is another halogen that can exhibit both positive and negative oxidation states. It commonly shows oxidation states of -1, +1, +3, +5, and +7, similar to iodine. Therefore, bromine does not only show negative oxidation states.

d) Chlorine:
Chlorine (Cl) is also a halogen and can exhibit both positive and negative oxidation states. It commonly shows oxidation states of -1, +1, +3, +5, and +7. Hence, chlorine does not only show negative oxidation states.

Conclusion:
Among the given options, fluorine is the only element that exhibits only a negative oxidation state (-1). Iodine, bromine, and chlorine can show both positive and negative oxidation states, making them unsuitable choices.