UPSC NDA I 2019 General Ability Solved Paper

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Question : 133 of 150

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Which one of the following statements regarding Electrocardiogram is correct?

[NDA I 2019]

Electrocardiogram is graphical representation of electrical activity of cornea
Electrocardiogram is graphical representation of activity of kidney
Electrocardiogram is graphical representation of activity of brain
Electrocardiogram is graphical representation of electrical activity of heart

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