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
True about epidemiology of leprosy -a) If high prevalence of cases seen in childhood, it means disease is under controlb) Lepra bacilli cannot survive outside hman bodyc) Bacterial load is high in tuberculoid varietyd) Insect can transmit the diseasee) Relapse rate is indicator of efficacy of the drug regimen 
Select and explain. 
A. de, B. bc, C. cd, D. bd
A: de
Answer: A: de 
Explanation: None