In human body if necessary, the plate, screw or wire used for surgery are made up of

Options

A. Ni
B. Au
C. Pt
D. Ta

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the materials used for surgical implants such as plates, screws, or wires in the human body.

2. **Identifying the Options**: The options provided are nickel, gold, platinum, and tantalum. We need to evaluate these metals based on their properties, particularly their suitability for surgical use.

3. **Evaluating Each Metal**:
- **Nickel**: While nickel is used in some medical applications, it can cause allergic reactions in some individuals and is not ideal for long-term implants.
- **Gold**: Gold is biocompatible and does not corrode, but it is expensive and not typically used for structural implants.
- **Platinum**: Platinum is also biocompatible and resistant to corrosion, but like gold, it is not commonly used for structural implants due to its cost.
- **Tantalum**: Tantalum is known for its excellent biocompatibility and corrosion resistance. It does not rust or corrode, making it safe for long-term use in the body.

4. **Conclusion**: Based on the properties evaluated, tantalum is the most suitable material for surgical implants due to its non-corrosive nature and biocompatibility. Therefore, the correct answer is tantalum.

5. **Final Answer**: The plate, screw, or wire used for surgery in the human body are made up of tantalum.

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