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In which of the following reaction(s) `overset(12)CO_(2)` is released ?

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In which of the following reaction(s) `overset(12)CO_(2)` is released ?
A. image
B. `Ph-underset(Br)underset(|)CH-overset(Br)overset(|)CH-COOHunderset(Delta)overset(NaHoverset(14)CO_(3))to`
C. `Meoverset(14)COOHunderset(Delta)overset(NaHCO_(3))to`
D. image
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Correct Answer - A::B::C
image (b) `Ph-CH=CH-Br+CO_(2)+overset(14)CO_(2)` (c ) `Meoverset(14)COONa+CO_(2)` (d) image
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