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: Dental
'Itch is disease' is true for – 
Select and explain. 
A. Atopic dermatitis, B. Insect bites, C. Seborrheic dermatitis, D. Tinea cruris
A: Atopic dermatitis
Answer: A: Atopic dermatitis 
Explanation: Atopic eczema is one of the most itchy disorder.