In both $DNA$ and $RNA$,the heterocyclic base and phosphate ester linkage are present at which positions of the sugar respectively?

  • A
    At $C_5$ and $C_2$ of the sugar respectively
  • B
    At $C_2$ and $C_5$ of the sugar respectively
  • C
    At $C_1$ and $C_5$ of the sugar respectively
  • D
    At $C_5$ and $C_1$ of the sugar respectively

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