`CH-=CHoverset(CH_(3)COOH,HgSO_(4))rarrZoverset("Dist.")rarrX+Y`
X and U are

CH-=CH+H_2O overset (H_2SO_4+HgSO_4)rarrX

Convert CH_3COOH into CH_4

In the reaction : HC -= CH overset(NaNH_(2))rarr X overset(CH_(3)I)rarr Y underset(HgSO_(4))overset(H_(2)O, H_(2)SO_(4))rarr Z, Z is :

CH_(3)-C-=C-CH_(3)overset(NaNH_(2))rarr'X' . What is X ?

CH-=CHoverset(NaNH_(2))to[A]overset(CH_(3)Br)to[B]