Under which column letter will 101 appear?

The counting numbers are arranged in four columns as shown at the right. Under which column letter will 101 appear?

Observing the pattern of numbers, arranged into 4 columns - First four numbers are in from left to right and the next four numbers are in reverse order. => After 8 numbers the pattern repeats.

The multiple of 8 nearest to 101 is 101/8 ~ 12 => 12*8 = 96 is the nearest multiple.
So 96 will be in Column A and then 101 - 96 = 5 columns to reach 101. So from A fifth column will be A, B, C, D and then again D.

101 will be under column letter D