Find out the wrong number in this sequence:

105, 85, 60, 30, 0,-45, -90

answer is ( a ) 0

sequence is

105 >-20> 85 >-25> 60 >-30> 30 >-35> -5 >-40> -45 >-45> 90

but in given sequence every thing is same but in place of -5 there is 0

so wrong no. is 0

correct answer is ( a ) 0