This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Clostridium, Subject name: Microbiology
[{'content': 'Most common symptom of tetanus is - \nSelect and explain. \nA. Tonic-clonic seizures, B. Hemplegia, C. Lock-jaw, D. Opisthotonus', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Lock-jaw o Generalized tetanus is the most common form of tetanus, involvement of masseter muscles (trismus or lock jaw) is the presenting sign is most patients.o Other features include -i) Risus sardonicus : sardonic smile that results from sustained contraction of facial musclesii) Opisthotonus : spasm of back muscle causes backwards curving of bodyiii) Drooling, sweating, irritabilityiv) Cardiac arrhythmias and fluctuation in BPv) Generalized increase in muscle tore", 'role': 'assistant'}]