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- Which of the following represent constitutional isomers? OI and II OI and III I and IV O II and III O I, II, III and IV || E m IVThe initial reactive intermediate in the elimination reaction of 2-bromo-3-methyl-pentane is a tertiary carbanion terminal alkene primary carbon radical O tertiary alcohol O secondary carbocationOC) 2 OD) 3 OE) 4 Which, if any, of the following are geometric isomers? Br Cl Cl H. CH3 C=C C=C* CH3 C=C %3D CH3 (II) Br (II) H Br OA) I and II OB) Il and III Oc) I and II OD) None of them are geometric isomers. O E) All of them are geometric isomers. What is the general formula for alkynes? OA) CnH2n+2 Aa A SEP 741 tv 28