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: Social & Preventive Medicine
Which of the following disease is transmitted by rat flea ? 
Select and explain. 
A. Trench fever, B. Chages disease, C. Oriental sore, D. Endemic typhus
D: Endemic typhus
Answer: D: Endemic typhus 
Explanation: Ans. is 'd' i.e., Endemic typhus