Correct option is A

T (20) - 2 → 18
E (5) - 2 → 3
N (14) - 2 → 12
S (19) - 2 → 17
I (9) - 2 → 7
O (15) - 2 → 13
N (14) - 2 → 12
Similarly, Apply the Same pattern to "MARUTHI"
M (13) - 2 → 11
A (27) - 2 → 25
R (18) - 2 → 16
U (21) - 2 → 19
T (20) - 2 → 18
H (8) - 2 → 6
I (9) - 2 → 7
Thus, MARUTHI → 112516191867
Therefore, the correct option is (a) 112516191867