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: Skin
Slapped cheek appearance is caused by ? 
Select and explain. 
A. Parvo virus, B. Measles, C. Rubella, D. HHV-6
A: Parvo virus
Answer: A: Parvo virus 
Explanation: Ans. is 'a' i.e., Parvo virus