Which of the following is NOT an ingredient in the "OPP" Italian Soda?

The "OPP" Italian Soda specifically refers to a flavor combination that includes orange, pomegranate, and peach syrups. Each of these syrups contributes to the unique taste profile that defines the drink. Therefore, when considering the ingredients listed, pineapple syrup does not belong to the combination, making it the correct choice for what is NOT included in the "OPP" Italian Soda.

Orange, peach, and pomegranate are the focus flavors, with pineapple being an entirely different flavor profile that is not associated with the OPP designation. This distinction is essential for those preparing or ordering this beverage, as it highlights the specific flavors meant to be present in an authentic OPP Italian Soda.