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
Epidemic relapsing fever is transmitted by? 
Select and explain. 
A. Louse, B. Soft tick, C. Hard tick, D. Rat flea
A: Louse
Answer: A: Louse 
Explanation: ANSWER: (A) LouseREF: Park textbook of preventive and social medicine 20th edition page 684 "Epidemic relapsing fever is transmitted by Louse"Always remember:Epidemic typhus Endemic typhus Epidemic relapsing fever Endemic relapsing feverLouse Rat flea Louse Soft tickDiseases transmitted by louse can be remembered as "PERT": Pediculosis, Epidemic typhus, Relapsing fever (Epidemic), Trench fever.Diseases transmitted by soft tick can be memorized as 'QRS": Q-fever, Relapsing fever (Endemic) by Soft tickDiseases transmitted by hard tick can be memorized as "Hard tick Takes Very Kind Babe": Tick typhus (Rocky Mountain spotted fever), Tick Paralysis, Tick fever, Tularemia, Viral encephalitis (Russian spring summer encephalitis), Viral hemorrhagic fever, Kyasanur Forest Disease, Babesiosis