Choose the series in which the number of the letters skipped in between adjacent letters is two.

Choose the series in which the number of letters skipped between two adjacent letters is one which both the letters are either of odd positions or of even positions otherwise one.

Choose the series in which the number of letters skipped between adjacent letters are 12, 22, 32, respectively.

Choose the series in which the number of letters skipped between adjacent letters is increasing by one.

Choose the series in which the number of letters skipped between adjacent letters is same.

Choose the series in which the number of letters skipped between adjacent letters are 12, 22, and 32, respectively.

Choose the series in which the number of letters skipped in between adjacent letters is decreasing by one.

Choose the series in which the number of letter skipped in between adjacent letters is decreasing by one.

Choose the series in which the number of letters skipped between adjacent letters are 1, 3and 5 respectively.

Choose the series in which the number of letters skipped in between adjacent letters are 5. 4 and 3 respectively.