Respuesta :

the answer is y because
5-3 =2
5-4=1
5-5=0
5-6=-1

3+2 = 5

4+1 = 5

5+0 = 5

6-1 =5

 so answer would be C. y=5-n

check:

5-3 = 2

5-4 =1

5-5 =0

5-6 = -1