This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Tuberculosis control is achieved when - 
Select and explain. 
A. Tuberculosis conversion index in infants is <1%, B. Prevalence on natural infection in age group 0-14 years is in order of 10%, C. Annual infection rate <5%, D. Prevalence of natural infection in 0-14 years is <1%
D: Prevalence of natural infection in 0-14 years is <1%
Answer: D: Prevalence of natural infection in 0-14 years is <1% 
Explanation: Park&;s Textbook of Preventive and Social Medicine 23rd edition Page no: 182 Tuberculosis control means reduction in the prevalence and incidence of disease in the community