Deficiency of which vitamin causes neural tube

Find the wrong number in the given number series.

16, 24, 36, 54, 81, 120.5

Find the wrong number in the given number series.

7, 15, 46, 93, 282, 561

18000    3000     600    150     40    25

Find the wrong number in the given number series.

276, 291, 308, 329, 341

12, 3.6, 18, 0.72, 0.432, 0.3024

88, 112, 78, 120, 64, 136

Find the wrong number in the series.

5, 12, 23, 38, 57, 80, 107

1080, 1058, 1016, 934, 772, 440

15, 27, 51, 99, 193, 387