This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Vegabond disease - 
Select and explain. 
A. Louse, B. Mite, C. Tick, D. Black fly
A: Louse
Answer: A: Louse 
Explanation: Lice are the vectors for the following diseases (Vagabond diseases) Epidemic typhus Relapsing fever Trench fever Dermatitis Park's Textbook of Preventive and Social Medicine, 25th edition, Page No. 837