This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Back region, Subject name: Anatomy
[{'content': 'In a freak hunting accident, a 17-year-old boy was shot with an arrow that penetrated into his Suboccipital Triangle, injuring the Suboccipital Nerve between the Veebral Aery and the Posterior Arch of the Atlas. Which of the following muscles would be unaffected by such a Lesion? \nSelect and explain. \nA. Rectus Capitis Posterior Major, B. Semispinalis Capitis, C. Splenius Capitis, D. Obliquus Capitis Superior', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The splenius capitis is innervated by dorsal primary rami of the middle and lower cervical nerves. The suboccipital nerve (dorsal primary ramus of C1) supplies the muscles of the suboccipital area, including the rectus capitis posterior major, obliquus capitis superior and inferior, and the semispinalis capitis. Note Rectus capitis posterior minor remains intact because it is not associated with C2 veebrae fracture', 'role': 'assistant'}]