In plants a common symptom caused by deficiency of P, K, Ca and Mg is

Options

A. bending of leaf tips
B. formation of anthocyanin
C. poor development of vasculature
D. chlorosis

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for a common symptom in plants that results from the deficiency of four specific nutrients: phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg).

2. **Identify the Symptoms of Nutrient Deficiencies**:
- **Phosphorus Deficiency**: Can lead to dark green leaves and stunted growth.
- **Potassium Deficiency**: Often results in yellowing of leaf edges and poor fruit development.
- **Calcium Deficiency**: Typically causes leaf tip burn and blossom end rot in fruits.
- **Magnesium Deficiency**: Commonly leads to interveinal chlorosis (yellowing between leaf veins).

3. **Evaluate the Options**:
- **Option 1: Bending of leaf tips**: This is primarily associated with calcium deficiency.
- **Option 2: Formation of anthocyanin**: This is linked to nitrogen and phosphorus deficiency, not a common symptom for all four nutrients.
- **Option 3: Poor development of vasculature**: This is caused by boron deficiency, not related to the nutrients in question.
- **Option 4: Chlorosis**: This refers to the yellowing of leaves and is a common symptom of deficiencies in potassium, phosphorus, calcium, and magnesium.

4. **Select the Correct Answer**: Based on the evaluation, the symptom that is common to the deficiencies of phosphorus, potassium, calcium, and magnesium is chlorosis.

5. **Final Answer**: The correct option is **Option 4: Chlorosis**.

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