Nitrogen can be estimated by Kjeldahl's method for which of the following compounds?

  • A
    $CH_3-CH_2-NO_2$
    Option A
  • B
    $CH_3-CH_2-NH_2$
    Option B
  • C
    $C_6H_5-N=N-C_6H_5$
    Option C
  • D
    $C_5H_5N$
    Option D

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