(‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐) study is to learn who, what, when, where & how of atopic.

• A. Descriptive research design
• B. Exploratory research design.
• C. Conclusive research design
• D. Diagnostic research design.