The correct option is D 5, 15, 8, 11, 10
2,20,19,12,14− Starting from 2nd row and than upward direction to next row than moving right direction in to same row and than moving diagonally downward to previous row each time
3,13,12,16,15 Starting from 2nd row and than upward direction to next row than moving right direction in to same row and than moving diagonally downward to previous row each time
4,14,16,8,7..Starting from 2nd row and than upward direction to next row than moving
right direction in to same row and than moving diagonally downward to previous row each time
Similarly next number will be 5,15,8,11,10
Hence, option 'D' is correct.