In the letter series, some of the letters are missing, which are given in the alternatives (A), (B), (C) and (D).
m n o n o p q o p q r _ _ _ _ s t u
(A) r
(B) s
(C) q
(D) p
Choose the correct sequence from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (B), (D), (C), (A)
Step-by-step observation
The series is formed by overlapping alphabetic sequences, each time:
- the starting letter shifts forward by one, and
- the length of the sequence increases by one.
So we get:
- m n o → 3 letters
- n o p q → 4 letters
- o p q r s → 5 letters
- p q r s t u → 6 letters
Now compare this with the given sequence:
After o p q r, the next four missing letters should be:
p, q, r, s
Match with options
Missing letters in order:
- p → (D)
- q → (C)
- r → (A)
- s → (B)
But the question asks for the correct sequence of options, so the order is:
(B), (D), (C), (A)