Which of these is a macronutrient?
AManganese
BMagnesium ion
CPotassium
DMolybdenum
Answer & Solution
Correct answer: C. Potassium
1. Macronutrients are present in large amounts.
2. The list runs from carbon through to magnesium.
3. Potassium is on the macronutrient list.
_Source: NCERT Class 11 Biology, Ch 12 'Mineral Nutrition'_
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