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Assertion: Heavy water is used to slow down neutron in nuclear reactor Reason: It does not react with slow speed neutron and mass of deuterium is comparable to the neutron (1) If both assertion and reason are true and reason is the correct explanation of assertion. (2) If both assertion and reason are true but reason is not the correct explanation of assertion. (3) If assertion is true but reason is false. (4) If both assertion and reason are false

Answer»

(1) If both assertion and reason are true and reason is the correct explanation of assertion.



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