A 43 year old presents presents with rashes trunk, palms and soles

A 43 year old presents presents with rashes trunk, palms and soles, 10 weeks ago he reported a painless ulcer on his penis. On examination, he was found to have buccal ulcers, and warty lesions on his penis. What is the most likely diagnosis?

a. Primary syphilis.
b. HIV
c. Chancroid.
d. Secondary syphilis.
e. Tertiary syphilis.

Ans: d. Secondary syphilis.