Picture D (Cooking)
Picture D is different because the girl is cooking.
Picture D (Table and chair)
Picture D is different because there are no table and chair.
Picture D (Inside)
Picture D is different because they are inside.
Picture C (Dancing)
Picture C is different because they are dancing.
Picture C (Book)
The book is different because it's not a fruit.
Picture B (Fish)
The fish is different because it can't fly.
Picture A (classroom)
Picture A is different because it's a classroom.