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In Hershey and Chase experiment, what finding led to the conclusion that DNA is the genetic material ?

(1) The presence of radioactivity in the bacteria when 35S was used.

(2) The presence of radioactivity in the supernatant when 35S was used.

(3) The presence of radioactivity in the bacteria when 32P was used.

(4) The presence of radioactivity in the supernatant when 32P was used.