The pattern is as follows:
T
|
H
|
E
|
R
|
E
|
F
|
O
|
R
|
E
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
T
|
E
|
E
|
O
|
E
|
R
|
F
|
R
|
H
|
1 |
3 |
5 |
7 |
9 |
8 |
6 |
4 |
2 |
in the same way, HELICOPTER can be written as:
H
|
E
|
L
|
I
|
C
|
O
|
P
|
T
|
E
|
R
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
H
|
L
|
C
|
P
|
E
|
R
|
T
|
O
|
I
|
E
|
1 |
3 |
5 |
7 |
9 |
10 |
8 |
6 |
4 |
2 |
Option (B) is correct.