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
All show iceberg phenomenon except ? 
Select and explain. 
A. Influenza, B. Polio, C. Hepatitis, D. Chicken pox
D: Chicken pox
Answer: D: Chicken pox 
Explanation: Ans. is 'd' i.e., Chicken pox In some disease, a great deal of subclinical infection occurs ? i) Rubella iii) Polio v) Japanese encephalitis vii) Influenza ii) Mumps iv) Hepatitis A and B vi) Diphtheria In chickenpox -Inapparent infection is estimated to occur in no more than 5% of susceptible children".