input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Patellar cluck syndrome is interposition of soft tissue at or hyperophied scar:   (A) Superior pole of patella and impinging on femoral component during flexion   (B) Superior pole of patella and impinging on femoral component during extension   (C) Inferior pole of patella and impinging on femoral component during flexion   (D) Inferior pole of patella and impinging on femoral component during extension
output: ['(B) Superior pole of patella and impinging on femoral component during extension <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Superior pole of patella and impinging on femoral component during flexion  (B) Superior pole of patella and impinging on femoral component during extension  (C) Inferior pole of patella and impinging on femoral component during flexion  (D) Inferior pole of patella and impinging on femoral component during extension <> possible answers', '  Patellar cluck syndrome is interposition of soft tissue at or hyperophied scar: <> context']