When a patient excretes less than 300 ml of urine in 24 hours, the condition is called:

Correct option is B

Ans. (b) Oliguria
Sol. Oliguria is defined as decreased urine output, typically less than 400 ml/day in adults. When it drops below 300 ml, it indicates a serious compromise in renal function or fluid balance.
Explanation of each option:
· (a) Polyuria – Excessive urine output (more than 2.5 liters/day).
· (b) Oliguria – Correct. Reduced urine output (less than 400 ml/day).
· (c) Anuria – Complete or near-complete absence of urine (less than 100 ml/day).
· (d) Uremia – Buildup of waste products in the blood due to kidney failure, not related to urine volume directly.