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Assertion: Heavy water is used to slow d...

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

A

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

B

2.If both assertion and reson are true but reason is not the correct explanation of assertion.

C

3.if assertion is true but reason is false.

D

4. If both assertion and reason are false.

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The correct Answer is:
A
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