Which of the following terms will replace the question mark (?) in the given series?
BDH, CEI, DFJ, EGK, FHL,?

Correct option is A

Let's analyze the given series BDH, CEI, DFJ, EGK, FHL to determine the logic behind it:
Logic: 1st letter +1, 2nd letter +1 and 3rd letter +1.
First letters: B, C, D, E, F
B (2nd letter of the alphabet)
C (3rd letter of the alphabet)
D (4th letter of the alphabet)
E (5th letter of the alphabet)
F (6th letter of the alphabet)
The sequence is increasing by one letter each time.
The next letter after F is G (7th letter of the alphabet).
Second letters: D, E, F, G, H
D (4th letter of the alphabet)
E (5th letter of the alphabet)
F (6th letter of the alphabet)
G (7th letter of the alphabet)
H (8th letter of the alphabet)
The sequence is increasing by one letter each time.
The next letter after H is I (9th letter of the alphabet).
Third letters: H, I, J, K, L
H (8th letter of the alphabet)
I (9th letter of the alphabet)
J (10th letter of the alphabet)
K (11th letter of the alphabet)
L (12th letter of the alphabet)
The sequence is increasing by one letter each time.
The next letter after L is M (13th letter of the alphabet).
Thus, the next term in the series is formed by taking the next letters in each sequence: G (7th), I (9th), M (13th).
Correct answer: (a) GIM