Assertion: SAN is called the pacemaker of the heart. Reason: SAN can generate action potentials , 70-75 times/min and is responsible for initiating and maintaining the rhythmic contractile activity of the heart. a. Both assertion and reason are true, and reason is the correct explanation of assertion. b. Both assertion and reason are true, but reason is not the correct explanation of assertion. c. Assertion is true but reason is false. d. Both assertion and reason are false.
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b. Both assertion and reason are true ,but reason is not the correct explanation of assertion.
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