Which of the following conditions could result in the backing up of urine due to blockage?

The chosen answer pertains to obstructive disorders, which directly relate to the blockage of the urinary tract. When there is an obstruction—whether due to stones, tumors, or structural abnormalities—urine can accumulate in the kidneys and urinary system. This leads to pressure buildup, which can cause kidney damage and other complications if not resolved.

Obstructive disorders are characterized by interference in the flow of urine, making it a straightforward and relevant choice in the context of urinary backup. The nature of these conditions is such that they can lead to physical hindrance in the passage of urine, distinguishing them from other conditions that primarily affect metabolism, inflammation, or the filtration processes within the kidneys.

In contrast, conditions like hepatitis, Crohn's disease, and glomerular disorders have different underlying mechanisms, primarily focusing on hepatic pathology, gastrointestinal inflammation, and kidney function changes, respectively. None of them directly result in urinary blockages, making them less applicable to the question regarding urine backup due to obstruction.