A ketone (A) which undergoes halaform reaction gives compound (B) an reduction. (B) on heating with `H_2 SO_4` gives (C) which forms monoozonide (D). (D) on hydrolysis in presence of zinc -dust gives only accetaldehyde. Identify (A) (B) and (C). Write the reactions invoived.

Explanation

(C) form a mono ozonide (D)
(D) on hydrolyss with zinc dust gives `CH_3 CHO` `therefore(C)` is `CH_3 CH=CH CH_3`
(B) on heating with `H, SO_4^*` gives `(C)`
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