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

ULJ : POO :: ? : KRT

PIO

Pattern followed here is :

ULJ : POO

U(21) - 5 = (16)P

L(12) →(opposite letter) = (15)O

J(10) + 5 = (15)O

Similarly ,

? : KRT

P(16) - 5 = (11)K

I(9) →(opposite letter) = (15)R

O(15) + 5 = (20)T

PIO is correct answer .