Rh factor found in man and Rhesus monkey was discovered by

Options

A. Landsteiner and Weiner
B. Willian Harvey
C. de castello and sturli
D. Rhesus

Answer

**Step-by-Step Solution:**

1. **Understanding the RH Factor**: The RH factor is a specific protein that can be present on the surface of red blood cells (RBCs). It is crucial for determining blood types in humans.

2. **Origin of the Name**: The term "RH" stands for "Rhesus," which refers to the Rhesus monkey. This is because the RH factor was first identified in this species.

3. **Discovery Timeline**: The RH factor was discovered in the year 1940. It was found that humans also possess this factor, which is important for blood transfusions and compatibility.

4. **Identifying the Discoverers**: The scientists credited with the discovery of the RH factor are Karl Landsteiner and Alexander Wiener. Their work established the significance of the RH factor in blood typing.

5. **Conclusion**: Therefore, the RH factor found in humans and Rhesus monkeys was discovered by Landsteiner and Wiener.

**Final Answer**: The RH factor was discovered by Karl Landsteiner and Alexander Wiener in 1940.

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