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Compound 'A' on chlorination gives compo...

Compound `'A'` on chlorination gives compound `'B'`, compound `'B'` reacts with alc. `KOH` gives gas `'C',` which decolourise Baeyer reagent. Ozonolysis of compound `'C'` gives only `HCHO` compound `'A'` is:

A

`C_2H_6`

B

`C_2H_4`

C

`C_4H_10`

D

`C_2H_5Cl`

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The correct Answer is:
A
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