The components of the vestibular apparatus are

Options

A. Three semicircular canals and the otolithic organs
B. Organs of Corti and Eustachian tube
C. Malleus, incus and stapes
D. Saccule and cochlea

Answer

### Step-by-Step Solution:

1. **Understanding the Ear Structure**:
- The ear is divided into three main parts: the external ear, the middle ear, and the inner ear.
- The external ear consists of the pinna and the external auditory meatus.
- The middle ear contains the bony ossicles: malleus, incus, and stapes.

2. **Identifying the Inner Ear Components**:
- The inner ear includes the cochlea, which contains the organ of Corti responsible for hearing.
- The vestibular apparatus is also part of the inner ear and is crucial for balance.

3. **Components of the Vestibular Apparatus**:
- The vestibular apparatus consists of three semicircular canals (posterior, anterior, and lateral) that are oriented at right angles to each other.
- It also includes two structures called the utricle and saccule, which are involved in detecting static balance and linear acceleration.

4. **Conclusion**:
- The components of the vestibular apparatus are the three semicircular canals and the otolith organs (utricle and saccule).
- Therefore, the correct answer to the question is that the vestibular apparatus comprises the three semicircular canals and the otolith organs.