Insert the missing number
121, 112, ..., 97, 91, 86  Choices
A) 102	B) 108	C) 99	D) 104	E) 114
first and second number difference is starting from 9, and further decresed by 1 by each iteration.   121, 112, ..., 97, 91, 86....   Dfference between two numbers Will be as 9, 8, 7, 6, 5,...   ANSWER:104
<result>D</result>
Insert the missing number
121, 112, ..., 97, 91, 86