Assertion :In ECG graph of heart, pulse 'R' is the peak point. Reason: It shows the atrial depolarisation which takes 0.2 seconds.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
A normal ECG is a series of ridges and furrows. It consists of different types of waves such as a P-wave, QRS complex, and T-wave. In ECG graph of heart pulse, 'R' is the peak point. It represents spreading of impulse from SA node, then to bundle of His and Purkinje fibers. It causes ventricular depolarisation resulting in ventricular contraction. It takes 0.06 to 0.10 seconds. Thus option C is the correct answer.

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