AIIMS 2017 Zoology Cardiovascular System Assertion Reason Question
In each of the following questions statement of Assertion is given followed by corresponding statement of Reason. Of the statements, mark the correct answer as Assertion (A) In ECG graph of heart pulse 'R' is the peak point. Reason (R) It shows the atrial depolarisation which takes 0.3 seconds.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
Assertion is true but Reason is false
Both Assertion and Reason are false
Correct Answer
Detailed Explanation
Assertion (A) is true because the 'R' wave in an ECG (electrocardiogram) represents the peak of ventricular depolarization, not atrial depolarization. Reason (R) is false because atrial depolarization is represented by the 'P' wave, which occurs before the 'R' wave and typically takes about 0.1 seconds, not 0.3 seconds. Therefore, while the assertion is accurate, the reason does not correctly explain it, making option C the correct choice. Options A and B are incorrect because they assert that both statements are true or that the reason explains the assertion, which is not the case. Option D is incorrect as the assertion is true.
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