MCQ
The following reaction gives


- A

- ✓

- C

- D







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$\xrightarrow{{Mg/THF}}A\mathop {\xrightarrow{{(i)\,C{H_3}CHO}}}\limits_{(ii)\,aq.N{H_4}Cl} B$

$\mathop {(A)}\limits_{{C_{11}}{H_8}O} \to $ does not under go self aldol condensation
$\mathop {(A)}\limits_{{C_{11}}{H_8}O} \xrightarrow{{{O_3}}}ph\, - \,CHO\, + \,2B\,\xrightarrow{{A{g^ + }}}$ Oxalic acid