Five vegetable boxes containing onion, tomato, garlic, ginger and potato respectively are arranged in a horizontal rack. Tomato and ginger boxes are placed at the extreme ends of the rack. Two boxes are placed between tomato box and potato box. Onion box is placed at the right of the garlic box. Boxes of onion and tomato are not placed adjacent to each other. Which box is placed between the boxes of garlic and potato?