Elimination of waste product from a normal person requires a minimal amount of urine of: (A) 100 ml, (B) 500 ml, (C) 100 ml, (D) 2000 ml
Answer is B. 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.