The criteria for the essentiality of a mineral element were given by

Options

A. Arnon and Stout
B. Hoagland
C. Hopkins
D. Sachs and Liebig

Answer

To answer the question regarding who provided the criteria for the essentiality of a mineral element, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for the scientist(s) who established the criteria for the essentiality of mineral elements in plants.

2. **Review the Options**: The options provided are:
- A) Arnon and Stout
- B) Hoagland
- C) Hopkins
- D) Sachs and Levy

3. **Recall the Criteria for Essentiality**: The criteria for the essentiality of a mineral element are:
- The element must be present in the plant for normal growth and completion of the life cycle.
- The element is required specifically and cannot be replaced by another element.
- The element must be directly involved in growth or metabolism.

4. **Identify the Correct Scientist**: The criteria for essentiality were published by Arnon and Stout. Therefore, the correct answer is option A.

5. **Conclude the Answer**: The criteria for the essentiality of a mineral element were given by Arnon and Stout.

### Final Answer:
The correct answer is **Option A: Arnon and Stout**.

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