An organic compound (A) `(C_(8)H_(14)O)` forms an oxime and gives a positive haloform reaction. On ozonolysis, it gives acetone and a compound (B) `(C_(5)H_(8)O_(2))` . (B) forms a dioxime and on subjecting to oxidation reaction gives an acid (C ) `(C_(4)H_(6)O_(4))`. On treatment with excess of ammonia and strong heating, (C ) gives a neutral compound (D) `(C_(4)H_(5)O_(2)N)`. (D) on distillation with zinc dust forms pyrrloe. Suggest the possible structures of (A), (B), (C ), and (D). Explain the chemical reactions involved.

Explanation

Structure of (B):
i. On oxidation, one is lost, so (B) must contain a `(Me-overset(O)overset(||)C-)` group and aldehyde group.