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: Pharmacology
Following are the structure passing through foramen magnum except (NOT REALTED TO PHARMACOLOGY) 
Select and explain. 
A. Cerebellar tonsils, B. Spinal cord, C. Spinal accessory nerve, D. Veebral aery
B: Spinal cord
Answer: B: Spinal cord 
Explanation: Structure crossing foramen magnum is lower medulla. The Spinal cord begins at the upper border of atlas veebra.