In the following question, select the related letters from the given…

1. Analyze the pattern in JRK : MUN:
  - J(10) + 3 = M(13)
  - R(18) + 3 = U(21)
  - K(11) + 3 = N(14)
2. Apply the +3 pattern to ABC:
  - A(1) + 3 = 4 -> D
  - B(2) + 3 = 5 -> E
  - C(3) + 3 = 6 -> F
3. Result: The corresponding letter group is DEF.

Final Answer: Option B