Choose the word whose underlined part is pronounced differently from the others

choose the word whose underlined part is pronounced differently from the others

1. a,light           b,fridge               c,sink               d,kitchen
2. a,lamps        b,windows          c,desks            d,plants
3. a,look           b,cook                c,book              d,room
4. a,poster        b,chopstick        c,sofa               d,wardrobe
5. a,honey        b,house              c,hour              d,hotel