A) Boron
B) Calcium
C) Chlorine
D) Potassium
Correct Answer: A
Solution :
Boron is the micronutrient for plants, present in the soil in very small amounts. It is absorbed from the soil in the form of boric acid\[({{H}_{3}}B{{O}_{3}})\] and tetraborate anions. Boron is required for pollen germination, seed germination and cell differentiation.
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