Number of cervical vertabrae in mammals are:

Options

A. 7
B. 8
C. 12
D. 6

Answer

To solve the question regarding the number of cervical vertebrae in mammals, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the number of cervical vertebrae in mammals. Cervical vertebrae are the bones that make up the neck region of the vertebral column.

2. **Identify the Options**: The options provided are:
- Option 1: 7
- Option 2: 8
- Option 3: 12
- Option 4: 6

3. **Recall the General Knowledge**: In mammals, it is a well-established fact that the number of cervical vertebrae is typically 7. This is true for most mammals, including humans.

4. **Evaluate Each Option**:
- **Option 1 (7)**: This is the correct answer as mammals generally have 7 cervical vertebrae.
- **Option 2 (8)**: This option is incorrect; mammals do not have 8 cervical vertebrae.
- **Option 3 (12)**: This option is also incorrect; 12 vertebrae are found in the thoracic region, not cervical.
- **Option 4 (6)**: This option is incorrect as well; mammals do not have only 6 cervical vertebrae.

5. **Conclusion**: The correct answer is **Option 1: 7**.