When the axons membrane is positively charged outside negatively charged inside, then the condition is known as :

Options

A. Action potential
B. Resting potential
C. Active potential
D. Differential potential

Answer

### Step-by-Step Solution:

1. **Understanding the Axon Membrane**: The axon membrane of a neuron has a specific charge distribution. In a resting state, the inside of the axon is negatively charged compared to the outside, which is positively charged.

2. **Identifying the Condition**: The question asks for the condition when the axon's membrane is positively charged outside and negatively charged inside. This description fits the resting state of the axon.

3. **Resting Potential**: In the resting state, the axon is not conducting any nerve impulses. The membrane is polarized, meaning there is a difference in charge across the membrane (negative inside and positive outside).

4. **Action Potential**: When a stimulus is applied, the axon membrane becomes permeable to sodium ions, leading to a reversal of charges (positive inside and negative outside). This is known as depolarization, which is not the condition described in the question.

5. **Conclusion**: Since the question specifies the axon's membrane is positively charged outside and negatively charged inside, this condition is referred to as the **resting potential**.

### Final Answer:
The condition is known as **resting potential**.

---