Decalcified Bone is :-

Options

A. Bone with organic matter
B. Bone with Inorganic matter
C. Bone without living cells
D. Bone without peristomium

Answer

### Step-by-Step Solution:

1. **Understanding Decalcification**: Decalcified bone refers to bone that has undergone a process where calcium ions are removed. This process is important for certain types of biological studies and investigations.

2. **Process of Decalcification**: The decalcification process typically involves treating the bone with a dilute acid, such as hydrochloric acid. This acid helps to dissolve the inorganic components of the bone, primarily calcium salts.

3. **Result of Decalcification**: After the decalcification process, what remains in the bone is primarily the organic matter. This organic matter consists of collagen fibers and other proteins that provide structure and flexibility to the bone.

4. **Identifying the Correct Option**: Given the options:
- Option 1: Bone with organic matter
- Option 2: Bone with inorganic matter
- Option 3: Bone with living cells
- Option 4: Bone with catastrophes

Since decalcified bone is characterized by the presence of organic matter after the removal of inorganic components, the correct answer is **Option 1: Bone with organic matter**.

### Final Answer:
**Decalcified Bone is: Bone with organic matter.**

---