STD symptomised by the development of chancre on the genitals is caused by the infection of
Treponema pallidum
Neisseria gonorrhoea
Human immunodeficiency virus
Hepatitis B virus
As we have discussed in STDs Caused by Bacteria -
Disease: Syphilis
Pathogen: Treponema pallidum
Symptoms:
Diagnosis:
Transmission:
Incubation Period: 10-90 Days
Treatment:
Hence, the correct option is (a)