Each row got 4 numbers.
150 / 4 = 37.5
-> there are 37 full rows of numbers
Odd row (from diagram) goes from left to right
Even row (from diagram) goes from right to left
Therefore, row number 37 goes from left to right.
Last number of row 37 is 37*4 = 148
Following the pattern, 149 is directly below that, then 150 is the one to the left => Column C