Number of letters skipped in between adjacent letters in the series are multiples of 3.
Which of the following series observes this rule ?
Answer: A . AELPZTweet
|A||B C D||E||F G H I J K||L||M N O||P||Q R S T U V W X Y||Z|
3, 6, 3, 9 are multiples of 3.