Select the option that represents the letters that, when sequentially placed in the blanks below, will complete the letter-series.
e_bho_etb_ _met_hom_tbhom

Let's count the total number of characters (including letters and blanks) in the given series:
The given series is: e _ b h o _ e t b _ _ m e t _ h o m _ t b h o m
Total number of positions = 24.

We can break the series into 4 equal groups of 6 letters each:
1st group: e _ b h o _
2nd group: e t b _ _ m
3rd group: e t _ h o m
4th group: \text{_ t b h o m}

By comparing the groups with each other:

Comparing the 2nd and 3rd groups (e t b _ _ m and e t _ h o m), we can see that the pattern of each group follows the sequence: e t b h o m.

Filling in the blanks according to this repeating pattern (e t b h o m):

1st group: e [t] b h o [m]

2nd group: e t b [h] [o] m

3rd group: e t [b] h o m

4th group: [e] t b h o m

The complete pattern formed is e t b h o m repeated 4 times.
The letters sequentially filled in the blanks are: t, m, h, o, b, e.