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Minerals known to be required in large amounts for plant growth include:

1. (a) calcium, magnesium, manganese, copper
2. (b) potassium, phosphorus, selenium, boron
3. (c) magnesium, sulphur, iron, zinc
4. (d) phosphorus, potassium, sulphur, calcium

Correct answer: (d) phosphorus, potassium, sulphur, calcium

Solution

Plants require certain minerals in large amounts, called macronutrients. Phosphorus, potassium, sulphur, and calcium are all needed in relatively high quantities, unlike the trace elements listed in the other choices.

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