[Z] on treatment with Br2/FeBr3 in CCl4 produced a single dominating isomer  C8H7O2Br , while on other hand heating [Z] with soda lime gave toluene. The compound [Z] is :

1,2 & 4 on heating with soda lime gives toluene. But on reaction with    Br2/FeBr3 in CCl41 gives 3 products of formula C8H7O2Br2gives 1 products of formula  C8H7O2Br& 4 gives 2 products of formula  C8H7O2Br