B is correct as renal columns are the portons of renal cortex that extend into the renal medulla and separates adjacent pyramids. Muscular organ which propels urine from renal pelvis to urinary bladder is ureters Solution B is correct as renal columns are the portons of renal cortex that extend into the renal medulla and separates adjacent pyramids. Muscular organ which propels urine from renal pelvis to urinary bladder is ureters.