A \( \frac{\left(\frac{d^2y}{dt^2}.\ \frac{dx}{dt}-\frac{d^2x}{dt^2}.\ \frac{dy}{dt}\right) }{\left(\frac{dx}{dt}\right)^3} \)
B \( \frac{\frac{d^2x}{dt^2}}{ \frac{d^2y}{dt^2}} \)
C \( \frac{\frac{d^2y}{dt^2}}{\frac{d^2x}{dt^2}} \)
D \( \frac{\left(\frac{d^2x}{dt^2}.\ \frac{dy}{dt}-\frac{d^2y}{dt^2}-\frac{dx}{dt}\right)}{ \left(\frac{dy}{dt}\right)^3} \)