Which one of the following sexually transmitted diseases (STD) correctly matches with its pathogen?

Correct option is A

Correct Answer: (a)
Explanation:
Syphilis is caused by the bacterium Treponema pallidum, which is transmitted sexually or from mother to child during pregnancy.
Information Booster:
Treponema pallidum is a spirochaete bacterium.
Gonorrhoea is caused by Neisseria gonorrhoeae.
AIDS is caused by the Human Immunodeficiency Virus (HIV).
Urethritis is commonly caused by Chlamydia trachomatis or Neisseria gonorrhoeae, not Entamoeba.
STDs can be bacterial, viral, fungal, or protozoan in origin.
Additional Information:
(b) Wrong – Entamoeba gingivalis affects gums.
(c) Wrong – Leishmania donovani causes kala-azar.
(d) Wrong – Bacillus anthracis causes anthrax.