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
Most sensitive index of transmission in leprosy is - 
Select and explain. 
A. Incidence, B. Detection rate, C. Disability rate, D. Prevalence
A: Incidence
Answer: A: Incidence 
Explanation: Incidence rate is the most sensitive index of transmission of leprosy. Its the only index for measuring the effectiveness of measures taken. Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no.346