This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Raised ICP and Brain death, Subject name: Medicine
Which of the following supplies the pineal gland? 
Select and explain. 
A. Posterior choroidal aeries, B. Tuberothalamic, C. Recurrent aery of Heubner, D. Lenticulostriate aery
A: Posterior choroidal aeries
Answer: A: Posterior choroidal aeries 
Explanation: Pineal gland is present posterior to midbrain so if tumor is in pineal gland ,it may l/t dorsal mid brain syndrome as it would press on the midbrain from behind. * MCA(Middle Cerebral Aery) not a pa of Circle of Willis * PCA (Posterior Cerebral Aery) P1,P2 and 10-11 Post choroidal aeries P1 supplies- Midbrain P2 supplies -PCA Post choroidal aeries supplies -Pineal gland