The correct answer is (a).
In the given code, the letters are mapped to numbers as follows:
- B = 5
- A = 7
- K = 9
- E = 6
- F = 3
- I = 4
- R = 8
Therefore, the word “FEAR” is written as 3564.
Option (b) is incorrect because it does not follow the mapping of letters to numbers in the given code. The letter “E” is mapped to 6, not 5.
Option (c) is incorrect because it does not follow the mapping of letters to numbers in the given code. The letter “R” is mapped to 8, not 4.
Option (d) is incorrect because it does not follow the mapping of letters to numbers in the given code. The letter “A” is mapped to 7, not 4.