$1,2-\text{dichloroethane} + NaSCH_2CH_2SNa \to C_4H_8S_2 + (P)$
Unknown product $(P)$ of the above reaction is

  • A
    $1,4-$dithiane
  • B
    $1,4-$dithiacyclohexene
  • C
    $HS^{-}CH_2-CH_2-S^{-}CH_2-CH_2-SH$
  • D
    $HS^{-}CH_2-CH_2-SH$

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