The theory of germplasm" for organic evolution was put forward by :

Options

A. Darwin
B. Lamarck
C. Weismann
D. Muller

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the scientist who proposed the theory of germplasm in the context of organic evolution.

2. **Identifying the Theory**: The theory of germplasm states that germ cells (sperm and egg) carry hereditary material that is passed from parents to offspring. This theory emphasizes that only germ cells contain the genetic information necessary for inheritance, while somatic (body) cells do not.

3. **Historical Context**: The theory was proposed in the late 19th century, specifically in 1896. This is an important detail as it helps to place the theory within the timeline of evolutionary biology.

4. **Identifying the Scientist**: The scientist who formulated the theory of germplasm is August Weismann. He is known for his contributions to the understanding of heredity and evolution.

5. **Eliminating Other Options**: The question may provide other scientists such as Charles Darwin and Jean-Baptiste Lamarck, who are known for their own theories (natural selection and inheritance of acquired characteristics, respectively). It is important to distinguish their contributions from Weismann's germplasm theory.

6. **Conclusion**: Therefore, the correct answer to the question is August Weismann.

**Final Answer**: The theory of germplasm for organic evolution was put forward by August Weismann.

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