The part of internal ear responsible for hearing is

Options

A. cochlea
B. semicircular canal
C. utriculus
D. sacculus

Answer

To solve the question "The part of internal ear responsible for hearing is", we will analyze the given options one by one to identify the correct answer.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- A) Cochlea
- B) Semicircular canal
- C) Utriculus
- D) Sacculus

2. **Evaluate Each Option**:
- **Option A: Cochlea**: The cochlea is a spiral-shaped structure in the inner ear that contains the organ of Corti, which is responsible for converting sound vibrations into neural signals. This makes the cochlea the primary structure responsible for hearing.

- **Option B: Semicircular Canal**: The semicircular canals are three fluid-filled structures that are involved in maintaining balance and detecting rotational movements of the head. They do not play a role in hearing, so this option is incorrect.

- **Option C: Utriculus**: The utriculus is part of the vestibular system and helps in maintaining static equilibrium and balance. It is not involved in hearing, making this option incorrect.

- **Option D: Sacculus**: Similar to the utriculus, the sacculus is also involved in balance and static equilibrium. It does not contribute to the process of hearing, so this option is also incorrect.

3. **Conclusion**: After evaluating all the options, we find that the cochlea is the only part of the internal ear that is responsible for hearing. Therefore, the correct answer is:
- **A) Cochlea**