Which of the following is not a deficiency symptoms of minerals?

Options

A. Internode shortening
B. Necrosis
C. Chlorosis
D. Etiolation

Explanation

To determine which of the following is not a deficiency symptom of minerals, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Symptoms**: We need to look at the symptoms listed in the options and understand what they indicate regarding mineral deficiencies.

2. **Analyze Each Option**:
- **Option 1: Internode Shortening**: This symptom is associated with potassium deficiency. When potassium is lacking, plants exhibit shortened internodes.
- **Option 2: Necrosis**: This refers to the death of plant cells and can occur due to deficiencies in several minerals, including calcium, potassium, copper, or magnesium.
- **Option 3: Chlorosis**: This is characterized by the yellowing of leaves, which is often a result of deficiencies in minerals such as iron or manganese.
- **Option 4: Petiolation**: This condition occurs when plants grow in partial or complete absence of sunlight, leading to long, weak stems and smaller leaves. It is not directly caused by a deficiency of minerals but rather by inadequate light conditions.

3. **Conclusion**: Based on the analysis, option 4 (Petiolation) is not a deficiency symptom of minerals, as it is related to light conditions rather than mineral deficiencies.

### Final Answer:
The answer is **Option 4: Petiolation**.

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