Which of the following bones is in direct contact with oval window ?

Options

A. Incus
B. Stapes
C. Malleus
D. All of these

Answer

To solve the question "Which of the following bones is in direct contact with the oval window?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Ear**:
- The human ear is divided into three main parts: the outer ear, the middle ear, and the inner ear. The question pertains to the bones located in the middle ear.

2. **Identify the Bones in the Middle Ear**:
- The middle ear contains three small bones known as the ear ossicles: the malleus, incus, and stapes.

3. **Examine the Function and Connection of Each Bone**:
- The malleus (hammer-shaped) is attached to the tympanic membrane (eardrum) and connects to the incus.
- The incus (anvil-shaped) connects the malleus to the stapes.
- The stapes (stirrup-shaped) is the last bone in the chain and connects to the oval window.

4. **Identify the Bone in Direct Contact with the Oval Window**:
- The stapes is the only bone that directly contacts the oval window (also known as fenestra ovalis). It receives vibrations from the incus and transfers them to the oval window, which leads to the inner ear.

5. **Conclusion**:
- Based on the connections and functions of these bones, the correct answer to the question is the stapes.

### Final Answer:
- The bone that is in direct contact with the oval window is **stapes**.

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