<prompt> False about syphilis is :Incubation period is 9-90 daysSecondary syphilis is due to hematological disseminationSyphilitic ulcersChancre are extremely painfulGeneral paresis of Insane is due to CNS involvement in tertiary syphilis.  <response>: Syphilitic ulcersChancre are usually single in number, butter like, hard in consistency and typically painless. 