UB 15 is related to SF 11 in a certain way. In the same way, IO 8 is related to GS 4. To which of the given options is EL 3 related, following the same logic?​

Given:
UB 15 → SF 11
IO 8 → GS 4
EL 3 → ?

Logic: (First letter −2, Second letter +4, Number −4)

UB 15 → SF 11
U − 2 = S
B + 4 = F
15 − 4 = 11

IO 8 → GS 4
I − 2 = G
O + 4 = S
8 − 4 = 4

Similarly, EL 3 → ?
E − 2 = C
L + 4 = P
3 − 4 = −1
 EL 3 → CP −1

Thus, correct option is (a).