A. B
A. Mg
C. K
D. P
Correct Answer: Option A
A. B
Explanation
Boron (B) is highly immobile because of its size. Therefore, choice A is correct.
A. B
A. Mg
C. K
D. P
Correct Answer: Option A
A. B
Explanation
Boron (B) is highly immobile because of its size. Therefore, choice A is correct.
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