This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'ALL THE FOLLOWING ARE STRUCTURES PRESENT OUT SIDE BLOOD BRAIN BARRIER EXCEPT ? \nSelect and explain. \nA. TUBERUS CINERIUM, B. AREA OF PROSTREMA, C. LAMINA TERMINALIS, D. NEUROHYPOPHYSIS', 'role': 'user'}, {'content': 'Answer: A \nExplanation: TUBERUS CINERIUM IS PA OF FLOOR OF 3RD VENTRICLE REMAINING ALL ARE THE ONLY STRUCTURES OUTSIDE BBB REF :bd chaurasia', 'role': 'assistant'}]