This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal cord, its lesions and ANS, Subject name: Anatomy
[{'content': 'A 19 yrs old man met with accident and sustained internal injury in the abdomen. The fibres in the Nervus erigentes are lesioned , leading to disability /loss of following function - \nSelect and explain. \nA. Ejaculation, B. Erection, C. Sweating, D. Salivation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nervi erigentes - Pelvic splanchnic nerve (S2,3,4) causes/controls- Defecation Urination Erection of erectile tissues of the external genitalia Ejaculation and Sweating is controlled by sympathetic system . Salivation is controlled by parasympathetic system through cranial nerve 7 and cranial nerve 9.', 'role': 'assistant'}]