What was observed after centrifugation was done in bacterial cells that were infected with a bacteriophage growing in presence of radioactive phosphorous?

• A

  The supernatant becomes radioactive due to the presence of radioactive phosphorous and the precipitate remains non-radioactive.

• B

  The sediment becomes radioactive due to the presence of radioactive phosphorous and the supernatant remains non-radioactive.

• C

  Both supernatant and sediment become radioactive.

• D

  Radioactivity is observed neither in precipitate nor the supernatant.