Number of letters skipped in between adjacent letters in the series decreases by one.
Which of the following series is observing the rule ?

C. EJNQST

Select the series in which the letters skipped in between adjacent letters decrease in order.

D. SYDHK

Number of letters skipped in between adjacent letters in the series is in the order of 12, 22, 32.
Which of the following series observes the rule given above ?

A. CEJT