Banting and Macleod won the Nobel Prize in Medicine or Physiology is

Options

A. 1923
B. 1920
C. 1935
D. 1937

Answer

**Step-by-Step Solution:**

1. **Identify the Scientists**: The question refers to Banting and Macleod, who are known for their significant contributions to medicine.

2. **Understand Their Discovery**: Banting and Macleod are credited with the discovery of insulin, which is a crucial hormone for regulating blood sugar levels.

3. **Determine the Year of the Nobel Prize**: The Nobel Prize in Medicine or Physiology was awarded to Banting and Macleod in recognition of their discovery of insulin.

4. **Select the Correct Year**: The correct year when Banting and Macleod won the Nobel Prize is 1923.

5. **Conclude the Answer**: Therefore, the answer to the question is that Banting and Macleod won the Nobel Prize in Medicine or Physiology in 1923.

**Final Answer**: 1923

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