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
Not a sexually transmitted agent 
Select and explain. 
A. Streptococcus group B, B. Ebola, C. Candida Albicans, D. Corona Virus
D: Corona Virus
Answer: D: Corona Virus 
Explanation: None