Deltoid groove is present in
(a) Radio-ulna
(b) Femur
(c) Tibia-fibula
(d) Humerus

Options

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

Answer

To determine where the deltoid groove is present, we can follow these steps:

1. **Understand the Deltoid Groove**: The deltoid groove is also known as the delto-pectoral groove. It is a specific anatomical feature that is associated with certain bones.

2. **Identify the Options**: The question provides four options:
- (a) Radio-ulna
- (b) Femur
- (c) Tibia-fibula
- (d) Humerus

3. **Analyze Each Option**:
- **Radio-ulna**: This refers to the radius and ulna bones of the forearm. They do not have a deltoid groove.
- **Femur**: This is the thigh bone. The femur does not have a deltoid groove.
- **Tibia-fibula**: These are the bones of the lower leg. The tibia and fibula do not feature a deltoid groove.
- **Humerus**: This is the upper arm bone. The deltoid groove is located on the humerus, specifically between the deltoid muscle and the pectoral muscles.

4. **Conclusion**: Based on the analysis, the deltoid groove is present in the humerus.

5. **Final Answer**: The correct answer is (d) Humerus.