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Question

Among the following, deficiency of how many macronutrients cause necrosis?


A

Ca, Mg, Cu and K

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B

N, Fe, Mn and Ca

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C

Mg, S, Mo and K

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D

Zn, Cu, Mn and Mg

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Solution

The correct option is A

Ca, Mg, Cu and K


The correct option is A:

Explanation of the correct option:

  1. Cell damage causes necrosis, which causes cells in live tissue to die prematurely.
  2. Necrosis is caused by a lack of Cu, K, Ca, and Mg.

Explanation of the incorrect option:

Option B:

Chlorosis is caused by a lack of Fe and Mn, whereas a lack of N causes flowering to be delayed.

Option C:

Mo, K, and S deficit restrict cell division, and K and S deficiency also causes chlorosis.

Option D:

Chlorosis is caused by a lack of Zn, Cu, Mn, and Mg, and necrosis is caused by a lack of Mg.

Final answer: Deficiency of Ca, Mg, Cu, and K causes necrosis.


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