Answer:
3 substances that are found in normal urine - water, urea, inorganic salts
3 substances that should not be present in urine - protein, sugar, blood cells
Step-by-step explanation:
Some important constituents of urine
a) Urea
b) Creatinine
c) Inorganic salts
d) Water
Urine must not have
a) Sugar
b) Protein
c) Blood cells (RBCs etc)