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Identify unknown compounds A to E in the...

Identify unknown compounds A to E in the following sense of chemical reactions.
(i)
(ii) `A+B overset("dil NaOH")to C+ H_(2)O`
(iii) `C overset((i) O_(3)) underset((ii) Zn//H_(2)O) to A+D`
(iv) `D overset(H_(2)//Ni)underset(Delta) to E`

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(iii) ` D=CH_3 - overset(O ) overset(||) C-CHO " " (iv ) E= CH_3 overset(OH) overset(|)CHCH_2 OH `
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