What should come in place of? in the given series based on the English alphabetical order?
LAT, KYS, JWR, IUQ, ?

Correct option is B

the given letter pattern:
LAT, KYS, JWR, IUQ, ?

Logic = first letter, second letter and third letter is decreasing by 1, 2 and 1 rspectively.
Break the pattern into individual letter sequences
Looking at each position separately:
1st letter: L → K → J → I → ?
2nd letter: A → Y → W → U → ?
3rd letter: T → S → R → Q → ?
Identify the pattern for each position
1st letter sequence:
L → K (-1)
K → J (-1)
J → I (-1)
I → H (-1)
2nd letter sequence:
A → Y (-2)
Y → W (-2)
W → U (-2)
U → S (-2)
3rd letter sequence:
T → S (-1)
S → R (-1)
R → Q (-1)
Q → P (-1)

Determine the missing term
The missing term follows the pattern HSP.
Final Answer:
B) HSP

Alternate solution -

L - 1= K, K -1 = J, J -1 = I, I - 1 = H
A - 2= Y, Y - 2 = W, W - 2 = U, U - 2= S
T -1 = S, S - 1 = R, R -1 = Q, Q - 1 = P
? = HSP

hence option b is correct.