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: Dental
All of the following are sexually transmitted, Except – 
Select and explain. 
A. Candida albicans, B. Echinococcus, C. Molluscum contagiosum, D. Group B streptococcus
B: Echinococcus
Answer: B: Echinococcus 
Explanation: Echinococcus granulosus (Hydatid disease) is not a STD. All other three options are STDs.