How Conceptual Design begins?

A)
With Lofting
B)
With CFD tests
C)
With Fabrication
D)
With predefined requirements or new concept

Correct Answer :   With predefined requirements or new concept


Explanation : Conceptual Design is the first and foremost phase of Aircraft Design. Here, the rough design is being prepared based on certain requirements. In some cases it also initiated through new idea or concepts.