Which represents an oxidation ?

Which change represents an oxidation ?

Write the balanced ionic equation which represents the oxidation of iodine (I^(-)) ion by per-manganate ion in basic medium to give iodine (I) and manganese dioxide (MnO_(2)) .

Which of the following represents oxidation ?

Which equation represents an oxidation-reduction reaction?

Which of the following reaction represents oxidation?

Which of the following arrangement represents increasing oxidation number of the central atom?