Final answer:
When you flex Andrew's right hip and knee and then rotate his leg internally causing pain in the right lower quadrant, you have elicited the Obturator sign (Option 3).
Step-by-step explanation:
The test performed elicits the Obturator sign, which is one of the clinical signs used to assess appendicitis in a patient. This clinical sign is often used to assess for the presence of appendicitis. However, it is crucial to note that no single test is definitive for appendicitis, and this condition should be considered alongside a patient's full clinical presentation, including additional symptoms and history.
Thus, the correct option is number 3.