Please solve question no.4.

Dear Student, (a) The compounds through which nitrogen (if excess) is eliminated from body is called nitrogenous waste. Three types are ammonia, urea and uric acid. Main is Urea in humans. (b) The organic material excreted via kidney is known as Organic waste. Three organic wastes include Creatinine, Urea and Creatine. (c) Chemical elements or compounds (inorganic in nature) excreted from body is known as Inorganic waste. It includes inorganic salts like Sodium ion, potassium and chloride ion mainly. For rest of the queries, ask in separate threads to get rapid assistance from our experts. Regards