$T$.$O$. Diener discovered . . . . . . .

  • A
    Free infectious $RNA$
  • B
    Free infectious $DNA$
  • C
    Infectious proteins
  • D
    Bacteriophages

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Reason $R$: Bacterial viruses are obligate parasites in bacterial cells.
Which option is correct for Assertion $A$ and Reason $R$?

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