दी गई अभिक्रिया में (X), (Y) एवं (Z) को पहचानिए।
`CH_(3) CHO overset( K_(2) Cr _(2) O _(7)) underset( H_(2) SO _(4)) to (X) overset(PCl_(5)) to (Y) underset(anh. AlCl_(3)) overset(C_(6) H _(6)) to (Z)`

Options

A. `(X) = HCOOH, (Y) COCl _(2) , (Z) = C _(6) H _(5) Cl`
B. `(X) = CH _(3) COOH, (Y)=CHCOCl, (Z) = C _(6) C H_(5)COCH_(3)`
C. `(X) = CH _(3) C OOH (Y)= CH _(3) CH _(2) CH _(2) Cl, (Z) = C _(6) H_(5) CH _(2) CH_(2) CH _(3)`
D. `(X) = CH _(3) COCH _(3), (Y) = CH _(3) CHCICH_(3). (Z) = C_(6) H _(5) COCH _(3)`

Answer

B

Explanation

`{:(CH_(3) CHO overset([O]) to CH _(3) underset((X))(COOH )overset(PCl_(5)) to CH_(3) underset((Y)) (COCl)), (" "darr C_(6) H _(6)"," "निर्जल " AlCl_(3)), (" "C_(6) H _(5) COCH_(3)) , (" ""ऐसीटोफिनोना ") , (" "(Z)):}`