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. **Identify the Nutrient Deficiencies**: The question mentions the deficiencies of phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) in plants.

2. **Understand the Symptoms of Deficiencies**: Each of these minerals has specific symptoms associated with their deficiency. We need to determine which symptom is common among them.

3. **Evaluate Each Option**:
- **Option 1: Bending of leaf tips**: This symptom is primarily associated with calcium deficiency. Thus, it is not a common symptom for all four minerals.
- **Option 2: Formation of anthocyanin**: This is linked to nitrogen and phosphorus deficiency, not specifically to the four minerals mentioned. Therefore, it is not the correct answer.
- **Option 3: Poor development of vasculature**: This symptom is associated with boron deficiency, not with the four minerals listed. Hence, this option is also incorrect.
- **Option 4: Chlorosis**: Chlorosis is a yellowing of leaves due to insufficient chlorophyll and can occur due to deficiencies in potassium, phosphorus, calcium, and magnesium. This is the common symptom we are looking for.

4. **Conclusion**: The common symptom caused by the deficiency of phosphorus, potassium, calcium, and magnesium in plants is **chlorosis**.

**Final Answer**: Chlorosis

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