<prompt> Most common symptom of tetanus is -Tonic-clonic seizuresHemplegiaLock-jawOpisthotonus  <response>: 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 