Final answer:
The secondary stage of syphilis typically starts 4 to 10 weeks after the primary stage and lasts 3 to 6 weeks, making the correct answer (c) 2 to 10 weeks.
Step-by-step explanation:
The secondary stage of syphilis includes the time period of 2 to 10 weeks after the primary stage. The primary stage begins with the appearance of a chancre and lasts from 3 to 6 weeks, healing with or without treatment. Secondary syphilis is characterized by a systemic spread of the bacteria, resulting in symptoms such as skin rashes and sores on mucous membranes. It typically begins about 4 to 10 weeks after the initial infection and generally lasts 3 to 6 weeks. It is the most contagious stage of the disease and is recurrent in about 25% of cases.