Assertion: Deficiency symptoms occur if the soil is lacking any particular element.

Reason: Excess minerals cause toxicity.

If both assertion and reason are true then the reason is not the correct explanation of assertion

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If an assertion is true but the reason is false

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If both assertion and reason are false

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If both assertion and reason are true and the reason is the correct explanation of assertion.

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Solution

The correct option is A If both assertion and reason are true then the reason is not the correct explanation of assertion
Correct option: (b) If both assertion and reason are true then the reason is not the correct explanation of assertion.

Lacking any element in the soil may cause deficiency symptoms in plants and also inhibits their growth.

Due to the excess amount of minerals the plant growth gets inhibited, it acts as a toxin for plants.

For example, a high concentration of zinc elements can inhibit the growth of roots.

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