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Which of the following statements is false? 

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Ca2+ ions are not important in maintaining the regular beating of the heart.
Mg2+ ions are important in the green parts of the plants.
Mg2+ ions form a complex with ATP. 
Ca2+ ions are important in blood clotting. 

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detailed solution

Correct option is A

Ca2+ ions are required to trigger the contraction of muscles and to maintain the regular beating of the heart.

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