A. ONF
B. OLH
C. MLH
D. MNH
Answer:B
Explanation:
The given series is a mixed series.
Pattern for the first letter:
K+1, L+1, M+1, N+1, O
Pattern for the second letter:
P-1, O-1, N-1, M-1, L
Pattern for the third letters:
D+1, E+1, F+1, G+1, H
Hence, the next group in the series is OLH.