This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Special topics, Subject name: Forensic Medicine
Breakfast, Lunch and dinner sign 
Select and explain. 
A. Bed bug, B. Mite, C. Ant, D. Tick
A: Bed bug
Answer: A: Bed bug 
Explanation: Bed bugs classically form a line of bites colloquially referred to as " breakfast lunch and dinner" sign and rarely feed in the armpit or behind the knees which may help differentiate it from other hitting insects. Ref: wikipedia