If bone is kept for three days in 10% KOH sol,
it will

Options

A. be unaffected
B. dissolve
C. soften
D. break

Answer

To answer the question, "If bone is kept for three days in 10% KOH solution, it will:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Composition of Bone**:
- Bone is a type of connective tissue that is composed of both organic and inorganic components. The organic part mainly consists of collagen fibers and other proteins, while the inorganic part primarily consists of minerals like calcium phosphate.

**Hint**: Remember that bone has both organic (living) and inorganic (non-living) components.

2. **Identify the Effect of KOH on Bone**:
- Potassium hydroxide (KOH) is a strong base. It primarily reacts with organic materials. However, it does not react significantly with inorganic materials like calcium phosphate.

**Hint**: Consider what KOH is known to dissolve or affect.

3. **Predict the Outcome**:
- Since KOH does not react with the inorganic components of bone, the inorganic matrix (which provides hardness) will remain intact. The organic components may be affected, but the question specifically asks about the overall effect on the bone.

**Hint**: Think about whether the bone will change in structure or composition after being in KOH.

4. **Conclusion**:
- After keeping the bone in 10% KOH solution for three days, the bone will remain largely unaffected. It will not dissolve, soften, or break.

**Hint**: Reflect on the options given in the question and choose the one that aligns with your prediction.

### Final Answer:
The correct answer is **A) be unaffected**.