Mark the incorrect option .

Options

A. Carbon:% weight in earth's crust `lt` % weight in human body
B. Magnesium :% weight in earth's crust `gt` % weight in human body
C. Sulphur :% weight in earth's crust `gt` % weight in human body
D. Sodium : % weight in earth's crust ` gt` % weight in human body

Answer

To solve the question of identifying the incorrect option regarding the percentage weight of elements in the Earth's crust compared to the human body, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Analyze Option A: Carbon**
- Percentage weight of carbon in the Earth's crust: 0.03%
- Percentage weight of carbon in the human body: 18.5%
- Conclusion: Since 18.5% (human body) is greater than 0.03% (Earth's crust), this statement is **correct**.

2. **Analyze Option B: Magnesium**
- Percentage weight of magnesium in the Earth's crust: 2.1%
- Percentage weight of magnesium in the human body: 0.1%
- Conclusion: Since 2.1% (Earth's crust) is greater than 0.1% (human body), this statement is **correct**.

3. **Analyze Option C: Sulfur**
- Percentage weight of sulfur in the Earth's crust: 0.3%
- Percentage weight of sulfur in the human body: 0.25%
- Conclusion: Since 0.3% (Earth's crust) is greater than 0.25% (human body), this statement is **incorrect**.

4. **Analyze Option D: Sodium**
- Percentage weight of sodium in the Earth's crust: 2.8%
- Percentage weight of sodium in the human body: 0.2%
- Conclusion: Since 2.8% (Earth's crust) is greater than 0.2% (human body), this statement is **correct**.

### Final Conclusion:
- The incorrect option is **Option C**, as it incorrectly states that the percentage weight of sulfur is greater in the human body than in the Earth's crust.