For a wing of aspect ratio $A R$, having an elliptical lift distribution, the induced drag coefficient is (where $C_{L}$ is the lift coefficient)

(A) $\frac{C_{L}}{\pi A R}$

(B) $\frac{C_{L}^{2}}{\pi A R}$

(C) $\frac{C_{L}}{2 \pi A R}$

(D) $\frac{C_{L}^{2}}{\pi A R^{2}}$

For a wing of aspect ratio $A R$, having an elliptical lift distribution, the induced drag coefficient is (where $C_{L}$ is the lift coefficient)

(A) $\frac{C_{L}}{\pi A R}$

(B) $\frac{C_{L}^{2}}{\pi A R}$

(C) $\frac{C_{L}}{2 \pi A R}$

(D) $\frac{C_{L}^{2}}{\pi A R^{2}}$

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