Answer:
D: Professor
Explanation:
If you look at the work academician, it is very similar to the word, academics, which means learning. So it can't be dentist. "cian" is found in mathematician, magician, musician...
The point is, it's related to a profession. If you break musician down, it breaks down into "music" and "cian". Musician is someone who has a profession in music.
So, if we break down academician, it makes "academic" and "cian". That means that this is someone who has a profession in teaching. That leaves us with professor.
Hope this helps!
