Final answer:
Chancre is a primary symptom of syphilis, not secondary syphilis. It forms at the site of the initial infection and lasts for a few weeks.
Step-by-step explanation:
The statement 'Chancre forms 10-21 days after infection at site of initial infection; remains for 3-6 weeks describes secondary syphilis' is False. Chancre is actually a primary symptom of syphilis, not secondary syphilis. It forms at the site of the initial infection after 10-90 days and lasts for 3-6 weeks.
Learn more about Syphilis and its symptoms