Select the combination of letters that when sequentially

Solution

Which of the four options will replace the question mark (?) in the following series? XF 11 , YI 15, ZL 19 , AO 23, ? Given: P _ A A _ _ Z A _V _ _ A _ _ Concept:  (PZAAV) repetition of this letter cluster. Explanation:  To fill the series, we have to divide the series – P _ A A _ / _ Z A _V / _ _ A _ _ Let's check each option – (a) VPZZPVAP; P V A A P / Z Z A Z V /PV A AP (No repetitive pattern is followed) (b) ZPVVAPVZ; P Z A A P / V Z A V V / AP A VZ (No repetitive pattern is followed) (c) ZVPAPZAV; P  Z  A A  V  / P  Z A  A  V /  PZ  A  AV  ( PZAAV is repeated) (d) VZAAPVPZ; P V A A Z / A Z A A V / PV A PZ (No repetitive pattern is followed) So, the correct answer is  ZVPAPZAV . Thus, the correct option is (c).