Choose the incorrect pair from the following with reference to the human ear.

Options

A. mulleus , incus and stapes - provides the bony framework of the ear
B. pinna - collects the vibrations in the air which produce sound
C. Eustachian tube - helps in equalising the pressures on either sides of the eardrum
D. macula and crista - responsible for the maintenance of the balance of the body and posture

Answer

To solve the question of identifying the incorrect pair with reference to the human ear, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding 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 outer ear consists of the pinna (the visible part of the ear) and the external auditory canal.
- The middle ear contains three small bones known as ossicles: the malleus, incus, and stapes.
- The inner ear includes the cochlea and the vestibular apparatus.

2. **Evaluating the First Option**:
- The first option states: "Malleus, Incus, and Stapes are the ear ossicles."
- This statement is correct as these three bones are indeed the ossicles located in the middle ear. However, it also mentions they provide a "bony framework of the ear," which is misleading as they do not form a bony framework but rather transmit sound vibrations.

3. **Evaluating the Second Option**:
- The second option states: "Pinna is the outer ear part."
- This is correct. The pinna is the visible part of the outer ear that collects sound waves.

4. **Evaluating the Third Option**:
- The third option states: "Stachian tube helps in equalizing the pressure on either side of the eardrum."
- This is also correct. The Eustachian tube (or Stachian tube) connects the middle ear to the pharynx and helps equalize air pressure.

5. **Evaluating the Fourth Option**:
- The fourth option states: "Macula and Crystra are responsible for maintaining the balance of the body."
- This statement is correct. The macula and cristae are parts of the vestibular apparatus in the inner ear that help in balance and spatial orientation.

6. **Conclusion**:
- After evaluating all options, the incorrect pair is the first option regarding the malleus, incus, and stapes. While they are indeed ossicles, the description about them providing a "bony framework" is misleading.

### Final Answer:
The incorrect pair is the first option: "Malleus, Incus, and Stapes provide the bony framework of the ear."

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