Alliteration is the repetition of the same consonant sound in initial position in a series of words.
So, the correct answer here is B (Great is the Golden Cat who treads) as the sound "G" is repeated in the words "great" and "golden".
In answers A, C and D no consonant sound in initial position is repeated, so there is no example of alliteration.
1. Exhort
2. Galvanized
3. Hue
4. Incisive
5. Implacable
6. Ominous
7. Expedient
I tried my best it should be mostly right.