Which among the following compounds converts alkyl halides to nitro alkanes?

Which among the following compounds converts alkyl halides to nitro alkanes?
  1. Silver nitrite
  2. alc. Potassium cyanide
  3. alc. Silver cyanide
  4. Potassium nitrite

Asked in: MHT CET 2022 (07 Aug Shift 1)

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