Select the combination of letters that when sequentially placed in the blanks of the given series, will complete the series.z _ k _ c q t _ u _ p c _ _ z u _ _ c q t

Let's count the total number of letters and blanks in the series. The expression contains 22 slots. Let's find a repeating layout by grouping or finding identical blocks.Notice the ending pattern c q t and the beginning pattern z _ k. Let's see if the entire phrase forms a pattern based on the repeating sequence z u p k c q t.Let's test the 7-letter sequence z u p k c q t:$z[u]p[k]cqt\to$ zupkcqt$[z]u[p]kc[q][t]\to$ zupkcqt$zu[p][k]cqt\to$ zupkcqtLet's look at the options and check where our letters match. The blanks are filled sequentially by:1st blank: u2nd blank: p3rd blank: z4th blank: k5th blank: q6th blank: t7th blank: k8th blank: pThus, the sequence of missing letters is u, p, z, k, q, t, k, p. This matches Option B perfectly.