This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which of the following is not a STD? 
Select and explain. 
A. Trichomoniasis, B. Giardiasis, C. Amoebiasis, D. Leishmaniasis
D: Leishmaniasis
Answer: D: Leishmaniasis 
Explanation: Protozoal agents causing STD include: Trichomoniasis Giardiasis Amoebiasis Ref: Park 21st edition, page 304.