Structure of `C_(8)H_(8)CI_(2).` Which on aqueous alkali hydrolysis gives a product which does not give positive iodoform test but gives silver mirror test is:

Which one will give positive iodoform test?

Which one will give positive iodoform test?

Which isomer gives positive iodoform test?

Structure of C_8H_8Cl_2 , which on treatment with aqueous alkali followed by dehydration gives a product which does not give positive iodoform test, but gives silver mirror test, is: