This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Most common form of tetanus is generalized tetanus, in which toxins enter \nSelect and explain. \nA. Lymphatics, B. Blood stream, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Clinical Features\n→ Most common form of tetanus is generalized tetanus, in which toxins enter the lymphatics and bloodstream.\xa0\n→ Median time of onset after injury is 7days.\n→ First symptom– Pain and tingling at the site of inoculation.\xa0\n→ Early sign– increased tone of masseter muscles called as trismus/lock jaw, followed by sequential involvement of nerves of head, trunk and extremities (Descending tetanus).\n→ Sustained contraction of facial muscles results in risus sardonicus.\n→ Deep tendon reflex increase.\xa0\n→ Short incubation period = Grave prognosis .\n→ Neonatal tetanus is a rare form, with high mortality, it may occur after head injury or ear infection.', 'role': 'assistant'}]