Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
TMDS, PHXL, LCRE, HXLX, ?, ZNZJ
Answer & explanation
Correct answer: option 1

Explanation:
TMDS, PHXL, LCRE, HXLX, ?, ZNZJ
The logic followed here is :
T → (-4) → P → (-4) → L → (-4) → H → (-4) → D → (-4) → Z
M → (-5) → H → (-5) → C → (-5) → X → (-5) → S → (-5) → N
D → (-6) → X → (-6) → R → (-6) → L → (-6) → F → (-6) → Z
S → (-7) → L → (-7) → E → (-7) → X → (-7) → Q → (-7) → J
So, the letter-cluster that replaces the (?) to complete the series is "DSFQ"