Do dehalogenation of geminal dihalide with Zn in presence of dry ether produces cis alkene only??

Dear Student,

Geminal dihalide means both halogens atom attached on same carbon atom like 

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and Dehalogenation occurs when dihalide treated with Zn in presence of a solvent like dry ether in which  removal of both the halogen atoms occur and in the result only cis alkene formed.

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Regards,