<h2>Answer : Option B) Watermelon Juice.</h2><h3>Explanation :</h3>
When the experiment is conducted using the red cabbage water (already pink/purple in color) in three parts using sprite, watermelon juice and egg whites; the effect on the red cabbage water was in red color, purple (Neutral) and green in color respectively.
These color indicates -
Red - Acid
Pink/purple - Neutral
Green - Base.
So, when watermelon juice was mixed with the red cabbage water it didn't changed the color, which clearly indicates that watermelon juice was neutral in nature.
