Let’s verify the pattern carefully.
Series:
[
_ H M G D N H E J I F K P G L Q
]
We try placing C I O J K in the blanks:
Filled series:
[
C H M G D I N H E J O I F K P J G L Q K
]
Now look at positions in groups of 5:
C H M G D
I N H E J
O I F K P
J G L Q K
Check pattern within each group:
Look column-wise:
Col1 | Col2 | Col3 | Col4 | Col5 |
|---|
C | H | M | G | D |
I | N | H | E | J |
O | I | F | K | P |
J | G | L | Q | K |
Now observe vertical patterns:
Col1: C → I → O → J ( +6, +6, −5 )
Col2: H → N → I → G ( +6, −5, −2 )
Col3: M → H → F → L ( −5, −2, +6 )
Col4: G → E → K → Q ( −2, +6, +6 )
Col5: D → J → P → K ( +6, +6, −5 )
This repeating shift pattern (+6, +6, −5, −2 cyclically) fits consistently across columns.
So the inserted letters C I O J K maintain the pattern.
Correct answer: CIOJK