In a standard ECG which one of the following alphabets is the correct representation of the respectively activity of the human heart?
P-depolarisation of atria
R-repolarisation of ventricles
S-start of systole
T-end of diastole
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Assertion: Smaller the organism higher is the rate of metabolism per gram weight.
Reason: The heart rate of a six month old baby is much higher than that of an old person.