To solve the question of finding the odd one out from the given list of bones, we can follow these steps:
### Step-by-Step Solution:
1. **Identify the Groups**:
- The first group consists of bones related to the limbs: humerus, thigh (femur), tibia, fibula, radius, and ulna.
- The second group consists of bones related to the hand and foot: metacarpals, metatarsals, and phalanges.
- The third group consists of bones related to the axial skeleton: scapula, sternum, cranial bones, and vertebrae.
- The fourth group consists of carpals and tarsals, which are also part of the appendicular skeleton.
2. **Analyze Each Group**:
- The first group (humerus, femur, tibia, fibula, radius, ulna) includes long bones that are part of the appendicular skeleton.
- The second group (metacarpals, metatarsals, phalanges) includes bones of the hands and feet, which are also part of the appendicular skeleton.
- The third group (scapula, sternum, cranial bones, vertebrae) includes bones that are part of the axial skeleton. This is a mix of bones from the upper body and spine.
- The fourth group (carpals and tarsals) includes bones of the wrist and ankle, which are part of the appendicular skeleton.
3. **Identify the Odd One Out**:
- The first two groups and the fourth group consist of bones from the appendicular skeleton, while the third group consists of bones from the axial skeleton.
- Therefore, the odd one out is the third group (scapula, sternum, cranial bones, and vertebrae) because it is the only group that does not belong to the appendicular skeleton.
### Conclusion:
The odd one out is the third option: **scapula, sternum, cranial bones, and vertebrae**.
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