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
The following statements stand true for Mantoux test - 
Select and explain. 
A. Test is read before 48 hours, B. 6-9 mm induaion shows maximum chances of developing Tb, C. A positive test does not indicate that the person is suffering from disease, D. New cases are more likely occur in tuberculin negative person than those who already are tuberculin reactors
C: A positive test does not indicate that the person is suffering from disease
Answer: C: A positive test does not indicate that the person is suffering from disease 
Explanation: Test is read after 48 - 96 hours but 72 hours is ideal. Reactions exceeding 10 mm considered positive and between 6-9 considered doubtful. 92% of new cases occur in patients who are tuberculin reactors Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 195