Trochanters occur in

Options

A. Humerus
B. Femur
C. Radio-ulna
D. Tibio-fibula.

Answer

**Step-by-Step Solution:**

1. **Understanding Trochanters**: Trochanters are specific bony protrusions or tubercles found on certain bones in the body. They serve as important sites for muscle attachment.

2. **Identifying the Bones**: The question provides a list of bones: humerus, femur, radius, ulna, and tibiofibula. We need to determine which of these bones contains trochanters.

3. **Analyzing Each Bone**:
- **Humerus**: This is the bone of the upper arm. It does not have trochanters.
- **Femur**: This is the thigh bone and is known to have two major trochanters (greater and lesser trochanters) near its joint with the hip bone.
- **Radius and Ulna**: These are the bones of the forearm. Neither of these bones has trochanters.
- **Tibiofibula**: This refers to the combined structure of the tibia and fibula in some animals, but in humans, these bones do not have trochanters.

4. **Conclusion**: Based on the analysis, the only bone that contains trochanters is the femur. Therefore, the correct answer is the femur.

5. **Final Answer**: Trochanters occur in the femur.

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