Encircle the odd one of the following question

⇒ Option A is not odd as in the given pair of number -3 and 3 are additive numbers

⇒ Option B is not odd as in the given pair of numbers -5 and 5 are additive numbers

⇒ Option C is odd as in the given pair of number -6 and 1 are not additive numbers

⇒ Option D is not odd as in the given pair of number -8 and 8 are additive numbers

∴ Option C is the odd one as 1 is not the additive inverse of 6