During the resting state of a neuron, the axonal membrane is relatively more permeable to potassium ions and nearly impermeable to sodium ions. Which of the following best describes the ionic distribution across the membrane?

1. A.High concentration of ${\text{Na}}^{+}$ and negatively charged proteins inside the axon
2. B.High concentration of ${\text{K}}^{+}$ and negatively charged proteins inside the axon
3. C.High concentration of ${\text{K}}^{+}$ and ${\text{Na}}^{+}$ inside the axon
4. D.Low concentration of ${\text{K}}^{+}$ and high concentration of ${\text{Na}}^{+}$ inside the axon