The anti-sterility or anti-reproductory vitamin is:

Options

A. Vitamin ` B_12`
B. Vitamin D
C. Vitamin E
D. Vitamin A

Answer

To solve the question regarding which vitamin is known as the anti-sterility or anti-reproductive vitamin, we can follow these steps:

### Step 1: Understand the Terms
- **Sterility** refers to the inability to produce offspring or gametes.
- **Anti-sterility** means a substance that helps to reduce or oppose sterility, promoting reproductive health.

### Step 2: Analyze the Options
The question provides four options:
1. Vitamin B12
2. Vitamin C
3. Vitamin E
4. Vitamin A

### Step 3: Research Each Vitamin
- **Vitamin B12**: Primarily involved in red blood cell formation and neurological function.
- **Vitamin C**: Known for its role in immune function and collagen synthesis.
- **Vitamin D**: Important for bone health and calcium metabolism.
- **Vitamin E**: Recognized for its antioxidant properties and its role in reproductive health.

### Step 4: Identify the Anti-Sterility Vitamin
From research and historical context, Vitamin E is known as the anti-sterility vitamin. It was first discovered by scientist Herbert Evans in 1922, who identified it as a necessary factor for reproduction.

### Step 5: Conclusion
Thus, the correct answer to the question is **Vitamin E**.

### Final Answer
The anti-sterility or anti-reproductive vitamin is **Vitamin E**.

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