Batson's plexus of veins connects-
Prostatic and vertebral venous plexus
Gastric and hepatic veins
Upper and lower esophageal plexus
Superior amd inferior rectal veins
Ans. is 'a' i.e., Prostatic and vertebral venous plexus * 'There is valveless communication between prostatic plexus and vertebral venous plexus (Batson plexus) through which prostatic carcinoma can spread to vertebral column and skull'
Abdomen & Pelvis