Instructions: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: Question linked to image # 12 In the CT that is shown, the most likely diagnosis is:
Options: <1> Polycystic kidney disease <2> Retroperitoneal mass. <3> Renal tuberculosis <4> Renal cystic neoplasia. <5> Obstructive uropathy.
Output:
5