In a octagonal cylindrical refridgerator, cool drinks are kept such that all the cool drink on a face of the refridgerator are of the same product. Any product that is on a certain face is distinct from the product that is another face. Each of the products belong to exactly one of brands Coco-Cola or Pepsi-Cola. Mirinda, Pepsi, Dew, Sierra Mist and AMP belong to Pepsi-Cola whereas Coke, Sprite and Fanta belong to Coco-Cola. Sprite and Sierra Mist are placed on the opposite faces of the refridgerator. Dew is on the face that is in between the faces, which are occupied by drinks of Coco-Cola. There are exactly three products between Mirinda and AMP on either side. AMP and Sierra Mist are not placed on the adjacent faces of the refridgerator. Pepsi is to the immediate right of Coke.
i'm getting two cases for this question but one case is eliminated in the given solution. how is one case eliminated?