In adult, anuria refers to urine output less than?

Correct option is B

Sol. Anuria is defined as urine output less than 100 ml/day in adults, indicating kidney failure, urinary obstruction, or severe shock. It is a critical sign that needs urgent medical evaluation and sometimes dialysis.
Explanation of each option:
· (a) 50 ml/day – Extremely low but not the clinical threshold for anuria; this would indicate complete kidney shutdown.
· (b) 100 ml/day – Correct. Below this is considered anuria and requires emergency treatment.
· (c) 150 ml/day – Refers to oliguria, a state of low urine output, not complete absence like in anuria.
· (d) 200 ml/day – Above the anuria cutoff, may be low but still not diagnostic of anuria.