The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 10 year old child came to the OPD with pain and mass in right lumbar region with no fever, with right hip flexed. The pain increased on extension and X ray showed spine changes. Most probable diagnosis is:   (A) Psoas abscess   (B) Pyonephrosis   (C) Appendicular lump in retrocecal position   (D) Torsion of Right undescended testis
['(A) Psoas abscess <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Psoas abscess \n (B) Pyonephrosis \n (C) Appendicular lump in retrocecal position \n (D) Torsion of Right undescended testis <> possible answers', '  A 10 year old child came to the OPD with pain and mass in right lumbar region with no fever, with right hip flexed. The pain increased on extension and X ray showed spine changes. Most probable diagnosis is: <> context@']