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Oxidation number of C in CH(3)OH,CH(2)O,...

Oxidation number of C in `CH_(3)OH,CH_(2)O,COOH and C_(2)H_(2)` is respectively :

A

`-2, 0, +2, -1`

B

`+2,0,+2,-2`

C

`-2,0,+2,0`

D

`-2,-4,+2,-2`

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The correct Answer is:
A
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