In which of the following all three are macro-nutrients

Options

A. iron, boron, calcium
B. Iron, copper, molybdenum
C. Molybdenum, magnesium, manganese
D. Nitrogen, nickel, phosphorus

Answer

To determine which option contains all three macronutrients, we can analyze each option based on the classification of nutrients into macronutrients and micronutrients.

### Step-by-Step Solution:

1. **Understand Macronutrients and Micronutrients**:
- Macronutrients are required by plants in larger quantities (more than 10 millimoles). Examples include nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur.
- Micronutrients are required in smaller quantities (less than 10 millimoles). Examples include iron, boron, copper, zinc, and manganese.

2. **Evaluate Each Option**:
- **Option 1: Iron, Boron, Calcium**:
- Iron: Micronutrient
- Boron: Micronutrient
- Calcium: Macronutrient
- **Conclusion**: Only one macronutrient (Calcium).

- **Option 2: Iron, Copper, Molybdenum**:
- Iron: Micronutrient
- Copper: Micronutrient
- Molybdenum: Micronutrient
- **Conclusion**: No macronutrients.

- **Option 3: Molybdenum, Magnesium, Manganese**:
- Molybdenum: Micronutrient
- Magnesium: Macronutrient
- Manganese: Micronutrient
- **Conclusion**: Only one macronutrient (Magnesium).

- **Option 4: Nitrogen, Nickel, Phosphorus**:
- Nitrogen: Macronutrient
- Nickel: Micronutrient
- Phosphorus: Macronutrient
- **Conclusion**: Two macronutrients (Nitrogen and Phosphorus).

3. **Final Evaluation**:
- After evaluating all options, none of the options contain three macronutrients. However, **Option 4** has two macronutrients (Nitrogen and Phosphorus) and one micronutrient (Nickel).

### Answer:
None of the options contain all three macronutrients.