Jamal u ddin on Nearpeer MDCAT Common Room

Sir Hamza Asalam alaikum sir woh humare STB book me likha he urea is 1 lac times less toxic than ammonia and uric acid is 10k times less toxic than ammonia but in actual uric acid is least toxic than urea and ammonia sir I have confusion should we follow our textbook or the right thing of other books like Punjab and federal last time our paper was similar to Federal lines