A. Urea B. Uric acid C. Ammonia D. Urine
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A. Smelting B. Calcination C. Liquation D. Roasting
A. Hepatic portal vein B. Renal artery C. Renal vein D. Pulmonary artery
A. Prostomium B. Peristomium C. Clitellum D. Tail
A. Its high density B. Its high polishing C. Its chemical inertness D. Presence of free electrons
A. Silver B. Copper C. Iron D. Sodium
A. Siderite B. Haematite C. Pyrites D. Bauxite