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B
Ca
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C
Mo
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D
S
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Solution
The correct option is B Ca
Calcium is an macronutrient which is absorbed by the plant as calcium ions. It is required by meristematic and differentiating tissues. It is a constituent of calcium pectate of middle lamella. Also, it is needed during the formation of mitotic spindle. Ca++ is essential for root growth and regulation of metabolic activities of plant