Bone deformation, tooth decay and skeletal disorders are due to excess of in water.

Options

A. Silver
B. Mercury
C. Fluorine
D. Arsenic

Answer

To solve the question regarding the causes of bone deformation, tooth decay, and skeletal disorders due to excess in water, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Elements Involved**: The question suggests that certain elements in water can lead to health issues such as bone deformation, tooth decay, and skeletal disorders.

2. **Analyze the Effects of Different Elements**:
- **Arsenic**: Known to cause skin pigmentation issues but does not directly relate to bone deformation or tooth decay.
- **Fluorine**: Excessive fluoride in water can lead to a condition known as fluorosis, which causes yellowing of teeth and can damage tooth enamel.
- **Mercury**: Primarily associated with kidney issues and does not directly cause skeletal disorders or tooth decay.
- **Silver**: While silver can be related to dental issues, it is not a primary cause of skeletal disorders or bone deformation.

3. **Focus on Fluorine**: The primary element that relates to tooth decay and skeletal disorders is fluorine. Excessive fluoride can lead to fluorosis, which affects the teeth and can also impact bone health.

4. **Conclusion**: Based on the analysis, the excess of fluorine in water is responsible for bone deformation, tooth decay, and skeletal disorders.

### Final Answer:
The excess of **fluorine** in water leads to bone deformation, tooth decay, and skeletal disorders.

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