The correct answer is A. a circular disc or plate held normal to flow.
Friction drag is the component of drag that is caused by the friction of the fluid flowing over the surface of the object. Pressure drag is the component of drag that is caused by the difference in pressure between the front and back of the object.
A circular disc or plate held normal to flow has a very large surface area in contact with the fluid, and the fluid flows over the surface of the disc in a very turbulent manner. This results in a large amount of friction drag.
A sphere has a smaller surface area in contact with the fluid, and the fluid flows over the surface of the sphere in a more laminar manner. This results in a smaller amount of friction drag.
A cylinder has a surface area that is intermediate between that of a disc and a sphere. The fluid flows over the surface of the cylinder in a manner that is somewhere between turbulent and laminar. This results in a friction drag that is intermediate between that of a disc and a sphere.
An airfoil has a very small surface area in contact with the fluid, and the fluid flows over the surface of the airfoil in a very laminar manner. This results in a very small amount of friction drag.
Therefore, the friction drag is generally larger than pressure drag for a circular disc or plate held normal to flow.