Which of the following reaction is an example of elimination reaction

1.	Which of the following reaction is an example of elimination reaction :
Answer» `CH_3-CHOunderset(H_2O)OVERSET(CH_3MgBr)to CH_3-undersetunderset(OH)(\|)CH-CH_3` `CH_3-undersetunderset(OH)(\|)CH-CH_3underset(Delta)overset(Conc. H_2SO_4)to CH_3-CH=CH_2` `CH_3-CH_2-OH overset(PBr_3)to CH_3-CH_2-Br` `CH_3-CH_2-COOH overset(NaNH_2)to CH_3-CH_2-COONa+NH_3` Answer :B

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