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Question

On the basis of symptoms of chlorosis in leaves, a student inferred that this was due to the deficiency of nitrogen. This inference could be correct only if yellowing of leaves appeared first in

A
Young leaves
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B
Old leaves
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C
Young leaves followed by Old leaves
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D
Old leaves followed by Young leaves
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Solution

The correct option is D Old leaves followed by Young leaves
On the basis of symptoms of chlorosis in leaves, a student inferred that this was due to the deficiency of nitrogen. This inference could be correct only if yellowing of leaves appeared first in young leaves followed by old leaves.Chlorosis is the main symptom of nitrogen deficiency. As a result, the leaves gradually become pale or yellow. These symptoms first appear in old leaves and later in young leaves.

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