Which of the following is INCORRECT with respect to bone and its associated part ?

Options

A. Atlas vertebra - Odontoid process
B. Pectoral girdle - Acromion process
C. Humans - Trochlea
D. Ulna - styloid process

Answer

To solve the question "Which of the following is INCORRECT with respect to bone and its associated part?", we will analyze each option provided in the context of anatomy.

### Step-by-Step Solution:

1. **Understanding the Options**:
- We need to examine each option to determine if the information provided about bones and their associated parts is correct or incorrect.

2. **Option 1: Atlas Vertebrae and Odontoid Process**:
- The atlas vertebra (C1) is the first cervical vertebra, which supports the skull.
- The odontoid process (or dens) is a bony projection of the second cervical vertebra, known as the axis (C2).
- **Conclusion**: This statement is incorrect because the odontoid process is not associated with the atlas vertebra but with the axis vertebra.

3. **Option 2: Pectoral Girdle and Acromion Process**:
- The acromion process is a bony process on the scapula (shoulder blade) that forms part of the pectoral girdle.
- It connects the scapula to the clavicle.
- **Conclusion**: This statement is correct.

4. **Option 3: Humerus and Trochlea**:
- The trochlea is a structure on the humerus that articulates with the ulna at the elbow joint.
- **Conclusion**: This statement is correct.

5. **Option 4: Ulna and Styloid Process**:
- The styloid process of the ulna is a bony projection at the distal end of the ulna, which helps in the attachment of ligaments in the wrist.
- **Conclusion**: This statement is correct.

6. **Final Conclusion**:
- After analyzing all options, we find that the first option regarding the atlas vertebrae and odontoid process is the incorrect statement.

### Answer:
The INCORRECT statement is: **Atlas vertebrae and odontoid process**.