Protein lecithin theory of mineral salt absorption was put forward by :

Options

A. Lundegardh and Burstrom
B. Bennet Clark
C. Vanden Honert
D. None of the above

Answer

To answer the question regarding who put forward the protein lecithin theory of mineral salt absorption, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Theory**: The protein lecithin theory states that proteins can act as carriers for mineral salts when they are associated with lecithin. Lecithin is a phospholipid that is a component of the cell membrane.

**Hint**: Focus on the role of proteins and lecithin in the absorption process.

2. **Identifying the Key Components**: The theory emphasizes that proteins combine with lecithin to form a complex that facilitates the transport of molecules from outside the cell to the inside.

**Hint**: Remember that the interaction between proteins and lecithin is crucial for the absorption mechanism.

3. **Historical Context**: The theory was proposed in the year 1856. This historical context can help narrow down the potential authors of the theory.

**Hint**: Consider the timeline of scientific discoveries related to mineral absorption.

4. **Evaluating the Options**: The options provided are Lundegard and Burstrom, Bennet and Clark, Clark, Vanden Hornet, and none of the above.

**Hint**: Analyze each option based on historical contributions to the theory.

5. **Correct Identification**: The correct answer is Bennet and Clark, as they were the scientists who proposed the protein lecithin theory of mineral salt absorption.

**Hint**: Confirm the association of Bennet and Clark with the theory to finalize your answer.

### Final Answer:
The protein lecithin theory of mineral salt absorption was put forward by **Bennet and Clark**.