Correct option is D
S T O R M Y
19 20 15 18 13 25
Now split digits and add:
19 → 1+9 = 10 → 1+0 = 1 → A
20 → 2+0 = 2 → B
15 → 1+5 = 6 → F
18 → 1+8 = 9 → I
13 → 1+3 = 4 → D
25 → 2+5 = 7 → G
✔ So rule = sum digits → reduce to single digit → convert to letter
Apply to LOTUS:
L O T U S
12 15 20 21 19
Now:
12 → 1+2 = 3 → C
15 → 1+5 = 6 → F
20 → 2+0 = 2 → B
21 → 2+1 = 3 → C
19 → 1+9 = 10 → 1 → A
Final Code:
LOTUS → CFBCA