This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infection, Subject name: Medicine
What is the drug of choice for scrub typhus? 
Select and explain. 
A. Erythromycin, B. Doxycycline, C. Ciprofloxacin, D. Linezolid
B: Doxycycline
Answer: B: Doxycycline 
Explanation: Patients are treated with: 1. Doxycycline 100mg BD for 2 weeks 2. Azithromycin 500 mg OD for 3 days 3. Chloramphenicol 500mg QID for 2 weeks