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ln a nuclear reactor, the chain reaction stops if 

(A) The control rods are fully inserted into the graphite 

(B) A nuclear reactor has half the length of all its control rods inserted in graphite 

(C) The reactor core suddenly gets too hot 

(D) None of these

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Correct option (A) The control rods are fully inserted into the graphite   


 The control rods absorb all the neutrons, stopping the nuclear chain reaction.

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