Deficiency Symptoms and Correction · NCERT Biology

Which of the following elements, when deficient, causes the yellowing of leaves due to the loss of chlorophyll (chlorosis)?

  1. Ca, B, Cu
  2. N, K, Mg
  3. P, Si, Al
  4. C, H, O
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Correct answer: N, K, Mg

Chlorosis is primarily caused by the deficiency of Nitrogen, Potassium, Magnesium, Iron, Manganese, Zinc, and Molybdenum. These elements are vital for chlorophyll synthesis or its structural maintenance.

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