Question

Z Stereoisomer

I reviewed the videos on E and Z isomers. In this problem, I didn't think that option 3 could be a stereoisomer because both C are the same. Do I look at the groups attached to determine if it's Cis or Trans. I see that Br is likely the priority given it's molecular weight. I presume to make this a Z isomer the OH would have to also be priority? Is this correct?

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