Correct option is B
· E → 9
· X → 1
· A → 6
· C → 8
· T → 5
· M → 7
· I → 2
· L → 4
· K → 3
Encode MELT
Now, using the mapping above:
· M → 7
· E → 9
· L → 4
· T → 5
So, MELT is written as 7945.