Drag force is a function of ______. | Fluid Mechanics Questions

i)    projected area of the body
ii)    mass density of the fluid
iii)    velocity of the body
The    correct answer is
a)    (i) and (ii)
b)    (i) and (iii)
c)    (ii) and (iii)
d)    (i), (ii) and (iii)

Ans: d