Among the given triad of terms, identify the triad in which the terms are similar to each other.

Logic: ​Each pair First letter + 2 = Second letter

Let's check options:

R +2 → 2

M +2 → O

B +2 → D​

​All three pairs have a consistent difference of 2 between letters.

Pattern is same in all three.

A + 2 → C 

N + 2 → P 

J + 1 → K  

Y + 1 → Z 

C + 1 → D 

M + 7 → T 

J + -6  → D 

R + 2 → T 

O + 4 → S 

So, RT - MO - BD is Similar pattern.

Thus, the correct option is (a)