Correct option is (a) True
Easy explanation: Drag power of an aircraft is achieved by multiplying drag force with true airspeed. The formula for drap power is given as P\(\sqrt{\sigma}\)=DVe=YVe^3+\(\frac{ZW^2}{V_e}\) where Y is a constant, Ve is velocity, W is weight, Z is constant and D is total drag and P is power.