What are the structures of $X$,$Y$ and $Z$ in the following reaction sequence?

• A
  Structure of $X$: $C_6H_5NHCOCH_3$,Structure of $Y$: $m-NO_2-C_6H_4NHCOCH_3$,Structure of $Z$: $m-NO_2-C_6H_4NH_2$
• B
  Structure of $X$: $C_6H_5N(COCH_3)_2$,Structure of $Y$: $p-NO_2-C_6H_4N(COCH_3)_2$,Structure of $Z$: $p-NO_2-C_6H_4NH_2$
• C
  Structure of $X$: $C_6H_5N(COCH_3)_2$,Structure of $Y$: $3,5-(NO_2)_2-C_6H_3N(COCH_3)_2$,Structure of $Z$: $2,4,6-(NO_2)_3-C_6H_2NH_2$
• D
  Structure of $X$: $C_6H_5NHCOCH_3$,Structure of $Y$: $p-NO_2-C_6H_4NHCOCH_3$,Structure of $Z$: $p-NO_2-C_6H_4NH_2$