Which one of the following statements regarding Electrocardiogram is correct ?
[amp_mcq option1=”Electrocardiogram is graphical representation of electrical activity of cornea” option2=”Electrocardiogram is graphical representation of activity of kidney” option3=”Electrocardiogram is graphical representation of activity of brain” option4=”Electrocardiogram is graphical representation of electrical activity of heart” correct=”option4″]
This question was previously asked in
UPSC NDA-1 – 2019