This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Elimination of waste product from a normal person requires a minimal amount of urine of 
Select and explain. 
A. 100 ml, B. 500 ml, C. 100 ml, D. 2000 ml
B: 500 ml
Answer: B: 500 ml 
Explanation: For excretion of solutes (waste products) from kidney:-
Normal (at a concentration of 290 mOsm/L) → 1 litre of urine per day is required.
When there is maximum concentration (1400 mOsm/L) → Only 500 ml of urine per day is required.
When there is maximum dilution (30-50 mOsm/L) → 23.3 L of urine is required.