In the following question, select the related letter pair from the given alternatives.
YL: UH :: ?

Correct option is C

YL: UH using the -4 logic:
Y (25th letter) → U (21st letter): Y - 4 = U
L (12th letter) → H (8th letter): L - 4 = H
Now, let's apply the same -4 logic to the options and find the correct pair:
Option (a) PQ: RS
P (16th letter) → R (18th letter): this is +2, so this does not follow the -4 logic.
Q (17th letter) → S (19th letter): this is also +2, so this option is incorrect.
Option (b) OB: GT
O (15th letter) → G (7th letter): O - 4 = G
B (2nd letter) → T (20th letter): this doesn't match the -4 logic, so this option is incorrect.
Option (c) TG: PC
T (20th letter) → P (16th letter): T - 4 = P
G (7th letter) → C (3rd letter): G - 4 = C
This option follows the -4 logic perfectly.
Option (d) UU: VV
U (21st letter) → V (22nd letter): this is +1, not -4, so this option is incorrect.
Correct Answer:
The correct related letter pair is (c) TG: PC.