b e d f ? h j ? l

Question: b e d f ? h j ? l
[A].

i m

[B].

m i

[C].

i n

[D].

j m

Answer: Option A

Explanation:

The series may be divided into groups as shown:

b e d / f ? h / j ? l

Clearly in the first group, the second and third letters are respectively three and two steps ahead of the first letter.

A similar pattern would follow in the second and third groups.