Which of the following is not part of the drums?

Question : Which of the following is not part of the drums?

Answer : Platelet is not part of the drums.

7 little words

1. Two-door Plymouth model
2. Bruise around the eye
3. Roosting rod 7 Little Words
4. Easy mark 7 Little Words
5. Hockey footwear 7 Little Words
6. Hairstyle 7 Little Words
7. Painter Jackson 7 Little Words
8. 1940s Fairey aeroplane
9. Kind of gull 7 Little Words
10. Insignificant person 7 Little Words