The below pattern is given in the question,
E → 1
S → 2
R → 3
T → 4
A → 5
R → 6
U → 7
N → 8
A → 9
T → 10
Try all option one by one and formed a word by arranging them.
After arranging the option (b), we get the meaningful word -
R → 3
E → 1
S → 2
T → 4
A → 5
U → 7
R → 6
A → 9
N → 8
T → 10
Hence , the required answer will be Restaurant.