After drinking a large quantity of fluid, diuresis (excess urine production) typically begins after approximately:

1. Diuresis is urine production in excess of normal levels. 2. After a large fluid intake, the kidneys need time to detect and respond to the change. 3. Diuresis begins about 30 minutes after drinking, peaks around 1 hour, and returns to normal by about 3 hours. 4. '3 hours' in the options describes when normal production is re-established, not when diuresis begins, so it is ruled out. 5. So 30 minutes is correct. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 26 "Fluid, Electrolyte, and Acid-Base Balance", p.1258 §Regulation of Water Output_