Which of the following if taken excessively can accumulate in body and cause toxicity?

Options

A. Vitamin C
B. Vitamin D
C. Vitamin `B_2`
D. Vitamin K

Answer

To solve the question regarding which vitamin can accumulate in the body and cause toxicity when taken excessively, we can follow these steps:

### Step 1: Identify the Types of Vitamins
We need to categorize the vitamins mentioned in the options:
- **Vitamin C**: Water-soluble
- **Vitamin D**: Fat-soluble
- **Vitamin B2 (Riboflavin)**: Water-soluble
- **Vitamin K**: Fat-soluble

### Step 2: Understand Solubility and Storage
- **Water-soluble vitamins** (like Vitamin C and B2) are not stored in the body. They are excreted through urine, which means they are less likely to cause toxicity.
- **Fat-soluble vitamins** (like Vitamin D and K) can be stored in the liver and fatty tissues. This storage capability means that excessive intake can lead to accumulation and potential toxicity.

### Step 3: Analyze Each Option
- **Vitamin C**: Excessive intake is excreted and does not accumulate, so it does not cause toxicity.
- **Vitamin B2**: Similar to Vitamin C, it is water-soluble and does not accumulate.
- **Vitamin D**: Being fat-soluble, it can accumulate in the body and cause toxicity if taken in excess.
- **Vitamin K**: Also fat-soluble, but toxicity is rare and usually occurs only with synthetic forms.

### Step 4: Conclusion
From the analysis, the vitamin that can accumulate in the body and cause toxicity when taken excessively is **Vitamin D**.

### Final Answer
The correct option is **Vitamin D**.

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