Identify Z in the following sequence of react | vedclass

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(A) $C_2H_4Br_2$ undergoes dehydrohalogenation with alc. $KOH$ followed by $NaNH_2$ to form ethyne $(X)$: $C_2H_4Br_2 \xrightarrow{	ext{alc. } KOH, N

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Acetophenone

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(A) $C_2H_4Br_2$ undergoes dehydrohalogenation with alc. $KOH$ followed by $NaNH_2$ to form ethyne $(X)$: $C_2H_4Br_2 \xrightarrow{	ext{alc. } KOH, NaNH_2} HC \equiv CH (X)$.Ethyne undergoes cyclic polymerization in the presence of red hot $Fe$ tube at $873 \ K$ to form benzene $(Y)$: $3C_2H_2 \xrightarrow{	ext{Red hot Fe tube}} C_6H_6 (Y)$.Benzene reacts with acetic anhydride in the presence of anhydrous $AlCl_3$ (Friedel-Crafts acylation) to form acetophenone $(Z)$: $C_6H_6 + (CH_3CO)_2O \xrightarrow{AlCl_3} C_6H_5COCH_3 (Z)$.

Identify $Z$ in the following sequence of reactions.
$C_2H_4Br_2$ $\xrightarrow[\text{(ii) } NaNH_2]{\text{(i) alc- } KOH} X$ $\xrightarrow[\text{Red hot}]{\text{Fe tube, } 873 \ K} Y$ $\xrightarrow[\Delta]{\left(CH_3CO\right)_2O / \text{Anhyd-} AlCl_3} Z$

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Identify $Z$ in the following sequence of reactions.$C_2H_4Br_2$ $\xrightarrow[\text{(ii) } NaNH_2]{\text{(i) alc- } KOH} X$ $\xrightarrow[\text{Red hot}]{\text{Fe tube, } 873 \ K} Y$ $\xrightarrow[\Delta]{\left(CH_3CO\right)_2O / \text{Anhyd-} AlCl_3} Z$