Which of the following is a non-metal ?

Options

A. Tungsten
B. Mercury
C. Graphite
D. Platinum

Explanation

To determine which of the given options is a non-metal, we will analyze each option step-by-step.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- A) Tungsten
- B) Mercury
- C) Graphite
- D) Platinum

2. **Analyze Option A - Tungsten**:
- Tungsten is a chemical element with the symbol **W**.
- It belongs to the **D block** of the periodic table.
- D block elements are generally classified as **metals**.
- **Conclusion**: Tungsten is a metal.

3. **Analyze Option B - Mercury**:
- Mercury is a chemical element with the symbol **Hg**.
- It is also a **D block** element.
- Like tungsten, mercury is classified as a **metal**.
- **Conclusion**: Mercury is a metal.

4. **Analyze Option C - Graphite**:
- Graphite is an **allotrope of carbon**.
- Carbon is classified as a **non-metal**.
- Since graphite is an allotrope of carbon, it is also considered a **non-metal**.
- **Conclusion**: Graphite is a non-metal.

5. **Analyze Option D - Platinum**:
- Platinum is a chemical element with the symbol **Pt**.
- It is a **D block** element.
- Like tungsten and mercury, platinum is classified as a **metal**.
- **Conclusion**: Platinum is a metal.

6. **Final Conclusion**:
- After analyzing all options, the only non-metal among the choices is **Graphite (Option C)**.

### Answer:
The correct answer is **C) Graphite**.