I thought I... my scarf into the back of the wardrobe, but I couldn't find it there a) was throwing b) had thrown c) have thrown d) threw​

I thought I b) had thrown my scarf into the back of the wardrobe, but I couldn't find it there.

b) had trown;

l thought l had trown my scarf into the back of the wardrobe, but l couldn't find it there