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Single Choice Type Question
Which of the following is/are a characteristic feature of Boron.
I. It is a type of beneficial element required by plants only in special cases.
II. It is the major element required for uptake and utilisation of calcium ions.
III. Absorbed in the form of \( \mathrm{BO}_{3}{ }^{3-} \mathrm{B}_{4} \mathrm{O}_{7}^{2-} \) ions.
IV. Essential for pollen germination and carbohydrate translocation (phloem transport).
(1) I \& II
(2) II \& III
(3) I, III \& IV
(4) II, III \& IV
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