The correct answer is (B) M, N.
Explanation:
The letters of the code are shifted by 2 letters to the right compared to the original letters.
B becomes C (+1)
O becomes P (+1)
X becomes Y (+1)
The last two letters of HERO are RO.
R + 2 = T
O + 2 = Q
Therefore, the code for HERO is TQ.
The last two letters are Q and P, which is option (D).