Ordering X-Values by Second Derivative

Consider the particular solution $y=\sqrt{4x^2+25}$ to the differential equation $\frac{dy}{dx}=\frac{4x}{y}$. The second derivative is $\frac{d^2y}{dx^2}=\frac{100}{(\sqrt{4x^2+25})^3}$. The approximate values of the second derivative for selected values of $x$ are as follows:

• At $x = -3$, $\frac{d^2y}{dx^2} \approx 0.210$
• At $x = -1$, $\frac{d^2y}{dx^2} \approx 0.642$
• At $x = 1$, $\frac{d^2y}{dx^2} \approx 0.642$
• At $x = 3$, $\frac{d^2y}{dx^2} \approx 0.210$

Based on this information, which of the following correctly orders the given $x$-values from least to greatest according to their corresponding second derivative values? If two second derivative values are equal, the smaller $x$-value should be listed first.