This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Eczema and related disorders, Subject name: Dental
Atopic dermatitis can be best diagnosed by 
Select and explain. 
A. Clinical evaluation, B. Patch test, C. IgE level, D. Skin Biopsy
A: Clinical evaluation
Answer: A: Clinical evaluation 
Explanation: Atopic dermatitis best diagnosed by Clinical evaluation. The diagnosis of atopic dermatitis is rarely aided by investigations. Estimation of total serum IgE, specific radio- allergosorbent tests (RASTs) and prick tests usually serve only to confirm the atopic nature of the individual. Patch testing may also help to identify a contact allergen responsible for deterioration of the skin condition, paicularly in adults.