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The degree of unsaturation in
i. `C_(3)H_(3)Cl_(3), ii. C_(3)H_(4)O, iii. C_(4)H_(5)N` is :
A. 2,1,3
B. 1,2,3
C. 3,2,1
D. 2,3,1

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Correct Answer - B
D.U in `C_(3)H_(3)CI_(3)=((2n_(C)+2)-(n_(CI)+n_(H)))/(2)`
D.U. in `C_(3)H_(4)O=((2_(nC)+2)-n_(H))/(2)=(8-4)/(2)=2^(@)`
D.U. in `C_(4)H_(5)N=((2n_(C )+2)-(n_(H)-n_(N)))/(2)`

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