In the series POQ, SRT, VUW, ? The blank space refers to

To solve this series, look at the pattern of the three letters in each group. First, look at the middle letter of each group: O, R, U. These letters follow a pattern of skipping two letters in the alphabet. O skip PQ to R, and R skip ST to U. Following this, U skip VW results in X. Second, look at the first and third letters of each group. In each case, they are the letters immediately preceding and following the middle letter. For POQ, O is the middle letter, P comes after and Q comes after that. However, a simpler way to see the sequence is to look at the entire string as a continuous alphabetical flow with a specific internal arrangement. The groups are: P O Q S R T V U W In each group, the order is second letter, first letter, third letter of a three-letter alphabetical sequence. Group 1: O P Q arranged as P O Q Group 2: R S T arranged as S R T Group 3: U V W arranged as V U W The next alphabetical sequence after UVW is XYZ. Applying the same arrangement, the first letter moves to the middle, resulting in Y X Z. Therefore, YXZ is the correct answer.