Solve the Following question

Dear student

Z configuration means having higher priority groups on same side of the double bond.
i)Compound I has I on one side and H on the other , thus it is E configuration.
ii)Both CH2OH and CH2Br groups are high priority compared to CH2CH3 and CH3 groups respectively, and both lie on the same side of the double bond.Thus it is Z configuration.
Same holds for compound (iii)
In compound (iv)H is low priority than CH3CH2 group and CH2Cl is low priority compared to COOH group.
Thus both high priority groups are on same side. I is Z configuration.

Thus option (2) is correct


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