Which letter-cluster will replace the question mark (?) to complete the given series?
TWGC, PUFZ, ?, HQDT, DOCQ

Correct option is C

Given: TWGC, PUFZ, ?, HQDT, DOCQ
Logic: 1st letter – 4, 2nd letter -2, 3rd letter – 1, 4th letter – 3.
To complete the series TWGC, PUFZ, ?, HQDT, DOCQ:
Patterns:
First letters: T, P, ?, H, D
Pattern: -4, -4, -4
T - 4 = P; P - 4 = L; L - 4 = H; H - 4 = D
Next letter is L
Second letters: W, U, ?, Q, O
Pattern: -2, -2, -2
W - 2 = U; U - 2 = S; S - 2 = Q; Q - 2 = O
Next letter is S
Third letters: G, F, ?, D, C
Pattern: -1, -1, -1
G - 1 = F; F - 1 = E; E - 1 = D; D - 1 = C
Next letter is E
Fourth letters: C, Z, ?, T, Q
Pattern: -3, -3, -3
C - 3 = Z; Z - 3 = W; W - 3 = T; T - 3 = Q
Next letter is W
Thus, the missing letter-cluster is LSEW.
Answer: (c) LSEW