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
[{'content': 'Which is the most common cranial nerve involved in raised ICP? \nSelect and explain. \nA. Abducens, B. Trochlear, C. Trigeminal, D. Facial', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A-Abducens= Longest subarachnoid course(so whenever ICP will raise abducens nerve will affect first) B-Trochlear=Longest intracranial route, thinnest, only nerve has dorsal origin C- Trigeminal=Thickest nerve D-Facial= Longest intraosseous route', 'role': 'assistant'}]