Rh blood group was discovered by

Options

A. Levine and Bateson
B. Weiner and Winchester
C. Landsteiner and Weiner
D. Landsteiner, Levine

Answer

To determine who discovered the Rh blood group, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Rh Blood Group**: The Rh blood group system is a classification of blood based on the presence or absence of the Rh factor (Rhesus factor), which is an antigen found on the surface of red blood cells. If the Rh factor is present, the blood type is considered positive (e.g., A+, B+), and if it is absent, it is negative (e.g., A-, B-).

2. **Identify the Scientists Involved**: The question provides several names as options for who discovered the Rh blood group. The names mentioned are:
- Levin and Vetsen
- Wiener and Winchester
- Landsteiner and Wiener
- Landsteiner and Living

3. **Research the Discovery**: The Rh blood group was discovered in 1940 through research involving Rhesus monkeys. The key scientists involved in this discovery were Karl Landsteiner and Alexander S. Wiener.

4. **Evaluate the Options**:
- **Levin and Vetsen**: Incorrect, as they were not involved in this discovery.
- **Wiener and Winchester**: Incorrect, as Winchester was not part of the discovery.
- **Landsteiner and Wiener**: Correct, as both were the scientists who discovered the Rh blood group.
- **Landsteiner and Living**: Incorrect, as "Living" is not a recognized scientist in this context.

5. **Conclusion**: The correct answer is **Landsteiner and Wiener**.

### Final Answer:
The Rh blood group was discovered by **Landsteiner and Wiener**.