Which of the following pair of Green House Gases was not included in the Annex A of the Kyoto Protocol ?

Annex A of the Kyoto Protocol (1997) listed six greenhouse gases: Carbon dioxide ($\text{CO}_2$), Methane ($\text{CH}_4$), Nitrous oxide ($\text{N}_2\text{O}$), Hydrofluorocarbons (HFCs), Perfluorocarbons (PFCs), and Sulphur hexafluoride ($\text{SF}_6$). Chlorofluorocarbons (regulated under the Montreal Protocol) and Ozone were not included in Annex A.