This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney and ureter, Subject name: Surgery
Under classification of Renal injuries, Laceration more than 1 cm without extension into the renal pelvis or collecting system comes under which Grade? 
Select and explain. 
A. Grade I, B. Grade III, C. Grade IV, D. Grade V
B: Grade III
Answer: B: Grade III 
Explanation: Grade Type Description I Contusion Microscopic (>3 RBCs/HPF)or gross hematuria, urological studies normal Hematoma Subcapsular, nonexpanding without parenchymal laceration. II Hematoma Nonexpanding perirenal hematoma, confined to renal retroperitoneum Laceration <1 cm parenchymal depth of renal coex without urine extravasation. III Laceration >1 cm parenchymal depth of renal coex without collection system rupture or urinary extravasation IV Laceration Parenchymal laceration extending through collecting system Vascular Main renal aery or vein injury with contained hemorrhage V Laceration Completely "Shattered kidney" Vascular Avulsion of renal hilum, devascularising the kidney.