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a
A-II; B-III; C-IV; D-I
b
A-III; B-II; C-IV; D-I
c
A-I; B-III; C-IV; D-II
d
A-IV; B-III; C-I; D-II
answer is A.
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Detailed Solution
Oxygen is non-mineral essential element involved in the structural organization of plants. Nitrogen is mineral element involved in structural organization of plants. Phosphorus and Magnesium are components of energy related organic compounds such as ATP and Chlorophyll. Potassium and chlorine can alter the osmotic potential of a cell.