Which of the following would be effective in removing nicotine stains?

Lemon juice and sodium hypochlorite can be particularly effective in removing nicotine stains due to their respective chemical properties.

Lemon juice contains citric acid, which has natural acidic properties that can help break down and dissolve organic compounds, including those found in nicotine stains. Its mild acidity can effectively penetrate the stain, making removal easier.

Sodium hypochlorite, commonly known as bleach, is a strong oxidizing agent that can break down pigments and stains, making it an effective cleaning agent for organic stains like those from nicotine. When used in combination with lemon juice, the effectiveness of stain removal increases, as the citric acid can enhance the action of the sodium hypochlorite.

Together, these substances create a powerful stain removal solution that can tackle the challenging nicotine residues that accumulate on surfaces.