This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'A 50 year old man suffering from carcinoma of prostate showed areas of sclerosis and collapse of T10 and T11 veebrae in X-ray.The spread of this cancer to the above veebrae was most probably through \nSelect and explain. \nA. Sacral canal, B. Lymphatic vessels, C. Internal veebral plexus of veins, D. Superior rectal veins', 'role': 'user'}, {'content': "Answer: C \nExplanation: C. i.e. Internal veebral plexus of veinsValve less communication exist between prostatic & veebral venous plexuses through which Prostatic carcinoma can spread to the veebral column & to the skull.QThis communicating plexus is k/a Bateson's plexusQBony metastasis of prostate is mainly osteoblastic (sclerotic)QPelvis is the most common site for bony metastasisQ followed by Lumber > Thoracic veebra.", 'role': 'assistant'}]