There is more than one conjunction in the sentence, the word but acts as a coordinating conjunction. Also the words not only and but also act as a correlative conjunction.
Answer:
What do you like most about your job?
Explanation:
What do you do for a living? Is kind of obvious
What is your favorite television show Sounds immature
What is your deepest darkest secret? Sounds immature
What do you like most about your job? Makes the most sense
<em>Hi There!!</em>
<em>I think the best answer is </em><em>Clause</em><em>...</em>
<em>Hope This Helps!!</em>

Its 'B' <span> flowers that are planted in soil that is too rich</span>