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Which of the following is not caused by deficiency of mineral nutrition?

1. Necrosis
2. Chlorosis
3. Etiolation
4. Shortening of internodes

Correct answer: Etiolation

Solution

Etiolation is caused by insufficient light, leading to pale, elongated growth. The other options are common symptoms of mineral deficiency in plants: chlorosis, necrosis, and shortened internodes.

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