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: Pathology
Which is the most common mode of transmission of HSV 1 
Select and explain. 
A. Saliva, B. Blood, C. Sexual transmission, D. Placental transmission
A: Saliva
Answer: A: Saliva 
Explanation: Transmission requires direct contact with secretions containing virus. Salivary is the most common mode of transmission of HSV-1, although sexual, blood, and placental transmission are also possible. Many transmissions occur in childhood via nonsexual contact, including kissing or sharing eating utensils, lip balms, or towels.