The correct answer is option (A):
Orator
The relationship between "Unbiased" and "Judge" is that an unbiased person is a quality often expected of a judge. A judge is expected to make impartial decisions, free from prejudice.
We need to find a word that has a similar relationship to "Articulate." "Articulate" means to express oneself fluently and coherently. Looking at the options, we need a profession or role where expressing oneself clearly is a key characteristic.
"Orator" is the best fit. An orator is a skilled public speaker. The essence of an orator's role is to be articulate. Therefore, the relationship between "Articulate" and "Orator" is that an orator is someone who is articulate, just as a judge is expected to be unbiased.
The other options don't fit the relationship as well. A soldier's skill is not necessarily articulation; a celebrity might be articulate, but it's not the defining feature of the role; a clown is not known primarily for articulation, and a novice is someone new to a skill, not necessarily articulate.