Select the option that is related to the fourth term in the same way as the first term is related to the second term.

DFIM : CEHL :: ? : KMPT

LNQU

Pattern followed is :

DFIM : CEHL

D(4) - 1 = (3)C

F(6) - 1 = (5)E

I(9) - 1 = (8)H

M(13) - 1 = (12)L

Similarly ,

? : KMPT

By using all options one by one , we find that only option 1 follows the pattern .

L(12) - 1 = (11)K

N(14) - 1 = (13)M

Q(16) - 1 = (16)P

U(21) - 1 = (20)T

LNQU , is correct answer .