Blood precipitation test was proposed by

Options

A. (a) Wallace
B. (b) Nuttal
C. (c) Bateson
D. (d) Needham

Answer

### Step-by-Step Solution:

1. **Understand the Question**: The question asks who proposed the blood precipitation test. This is a specific test used in medical sciences to detect antibodies in blood samples.

2. **Identify the Principle of the Test**: The blood precipitation test is based on the immune reaction between antigens and antibodies. When an antigen is introduced to a blood sample, it reacts with specific antibodies present in the sample.

3. **Review the Scientists Listed**: The options provided include Wallace, Nuttall, Bateson, and Meadham. Each of these scientists has made contributions to different fields.

4. **Evaluate Each Scientist**:
- **Wallace**: Known for his contributions to the theory of evolution, not related to blood tests.
- **Nuttall**: A physiologist who is credited with the invention of the blood precipitation test. This aligns with the question.
- **Bateson**: Coined the term genetics, which is unrelated to the blood precipitation test.
- **Meadham**: Proposed the theory of spontaneous generation, which is also not relevant to the test.

5. **Conclude the Answer**: Based on the evaluation, Nuttall is the scientist who proposed the blood precipitation test. Therefore, the correct answer is Nuttall.

### Final Answer:
The blood precipitation test was proposed by Nuttall.

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