Correct option is C

Concept:
-4, +3, -3 pattern follow.
Explanation:
First position:
B to X: -4
X to T: -4
T to P: -4
P to L: -4
Second position:
R to U: +3
U to X: +3
X to A: +3
A to D: +3
Third position:
K to H: -3
H to E: -3
E to B: -3
B to Y: -3
Following the identified pattern:
The first position follows the pattern of decreasing by 4.
The second position follows the pattern of increasing by 3.
The third position follows the pattern of decreasing by 3.
Thus, the next term in the series will be: LDY