Final answer:
Without the specific context from Salman Rushdie's work or the associated historical text, it is not possible to determine the number of disputed sites on the list.
Step-by-step explanation:
The organization that Sir Salman Rushdie refers to has listed several disputed sites, including the Babri Masjid. However, based on the provided information, it's unclear which specific organization Rushdie mentions or the exact number of sites listed. Therefore, it's not possible to provide a definitive answer as to whether there are 2, 5, 10, or 15 disputed sites on the list without additional context.
The question is likely referring to a specific text or context within Rushdie's work that outlines this list. To correctly answer this question, one would need to refer to that specific context within Rushdie's literature or a related historical document.