Use the word in brackets to complete sentence with suitable conjunction.
She likes coffee _______ she also likes green tea.

The correct answer is: But

But is used as conjunction in this sentence. Because, the first half of the sentence mentions some liking by the subject and the second half of the sentence also mentions the liking. But second half mentions the strong liking by the subject. So, 'but' is used in this case. When other one is preferred more than the first, we use 'but' in between as conjunction.