Identify (X), (Y) and (Z) retgents in the given sequence of reaction.
`CH-=CH overset(X) to CH_(3)CHO overset(Y) to CH_(3)CH(OH)CH_(3) overset(Z) to CH_(3)COCH_(3)`
A. `X=H_(2)SO_(4), Y=H_(2)O//OH^(-), Z=PCl_(5)`, heat
B. `X=HNO_(3), Y=Na_(2)CO_(3),Z=H_(2)SO_(4)`, heat
C. `X=H_(2)SO_(4)//Hg^(2+), Y=PCl_(5)//H_(2)O, Z=K_(2)Cr_(2)O_(7)//OH^(-)`
D. `X=H_(2)SO_(4)//Hg^(2+),Y=CH_(3)MgBr//H_(2)O, Z=K_(2)CrO_(7)//H^(+)`
