Osteon is found in :-

Options

A. Femur of Rana tigrina
B. Sternum of pavo
C. Diaphysis part of femur of human
D. Epiphysis part of humerus of human

Answer

**Step-by-Step Solution:**

1. **Understand the Definition of Osteon**:
- Osteon is defined as the structural and functional unit of compact bone. It is also known as the Haversian system.

2. **Identify the Options Given**:
- The options provided are:
a) Femur of Rana tigrina
b) Sternum of Pavo
c) Diaphysis part of femur of human
d) Epiphysis part of humerus of human

3. **Analyze Each Option**:
- **Option a: Femur of Rana tigrina**: This is a bone that contains compact bone, and thus, it is likely to have osteons.
- **Option b: Sternum of Pavo**: The sternum is primarily made of cancellous (spongy) bone, which does not contain osteons.
- **Option c: Diaphysis part of femur of human**: The diaphysis of the femur is indeed composed of compact bone and contains osteons.
- **Option d: Epiphysis part of humerus of human**: The epiphysis is mostly made of spongy bone and does not contain osteons.

4. **Determine the Correct Answer**:
- Since both the femur of Rana tigrina and the diaphysis part of the femur of humans contain compact bone and thus osteons, we need to select the most appropriate option. The question specifically asks for where osteons are found, and since the femur of Rana tigrina is mentioned first and is a clear example of compact bone, it is the correct answer.

5. **Final Answer**:
- Osteon is found in the femur of Rana tigrina.

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