Batson's plexus of veins connects-
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'
Prostatic and vertebral venous plexus
Gastric and hepatic veins
Upper and lower esophageal plexus
Superior amd inferior rectal veins
Abdomen & Pelvis