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: Microbiology
In a case of Kala-azar aldehyde test becomes positive after - 
Select and explain. 
A. 2 weeks, B. 4 weeks, C. 8 weeks, D. 12 weeks
D: 12 weeks
Answer: D: 12 weeks 
Explanation: None