Which among the following on dehalogenation will give trans-alkene?

Which of the following reactions would give trans-alkene ? .

Which among the following alcohols, on dehydration will produce alkene that exhibits cis-trans isomerism?

Which of the following reactions will give least substituted alkene?

Which among the following alkenes will be most stable :

Which among the following alkenes will be most stable :

Which one of the following compounds on dehalogenation gives, 2,3 - dimethyl - but - 2 - ene ?

Which one of the following compounds on dehalogenation gives, 2,3 - dimethyl - but - 2 - ene ?

Which of the following reactions will not give Hofmann alkene ?