A child during operation and immediately after showed glycosuria, but later his urine sugar was normal. Choose the most probable diagnosis

The key is B. Normal finding. [Stress like surgery resulted release of stress hormne that is cortisol in excess than normal and caused transient hyperglycemia as evidenced by glycosuria. This is a normal phenomenon and when stress is over cortisol level comes to normal and hyperglycemia and glycosuria resolves].