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
Weil-Felix reaction positive with OXK antigen in: 
Select and explain. 
A. Trench fever, B. Scrub typhus, C. Endemic typhus, D. Epidemic typhus
B: Scrub typhus
Answer: B: Scrub typhus 
Explanation: Ans. is. 'b' i. e., Scrub typhus