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: Gynaecology & Obstetrics
Which of the following is not sexually transmitted : 
Select and explain. 
A. Echinococcus, B. Candida, C. Molluscum contagiosum, D. Group B. Streptococcus
A: Echinococcus
Answer: A: Echinococcus 
Explanation: Echinococcus