Ormithine cycle was discovered by ………. and ……...

Explanation

**Step-by-Step Solution:**

1. **Identify the Ornithine Cycle**: The Ornithine cycle, also known as the urea cycle, is a series of chemical reactions that occur in the liver. Its primary function is to convert ammonia, which is toxic at high levels, into urea, which can be safely excreted from the body.

2. **Know the Key Scientists**: The Ornithine cycle was discovered by two scientists. The names of these scientists are crucial for answering the question.

3. **Recall the Names**: According to the information provided, the Ornithine cycle was discovered by two individuals: Krebs and Hanslet.

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