Which is not a micronutrient?

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Boron

Magnesium

Molybdenum

Zinc

answer is B.

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Detailed Solution

Concept: Both plants and animals require nutrients to properly operate and control their cells and other metabolic processes. The amounts and ratios of the nutrients needed vary. The majority of the nutrients come from food sources.
The minerals found in micronutrients are inaccessible to living things. Through plants, they are extracted from the soil. Such minerals include calcium and iron. Different creatures use these minerals as they go up the food chain. Eating a sufficient amount of food must satisfy the daily nutrient need. Malnutrition results if it doesn't.
The micronutrient scare required in less amount than the macrominerals are needed.
Therefore the magnesium is not a micronutrient.
Hence, option 2 is the correct answer.

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