<prompt> A 50-year-old man suffering from carcinoma of prostate showed areas of sclerosis and collapse of T10 and T 11 veebrate was most probably throughSacral canalLymphatic vesselInternal veebral plexus of veinsSuperior rectal  <response>: Communication exists between prostatic veebral venous plexus through which prostatic carcinoma spread to veebral column. 