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

Regards