Sentence examples similar to only one applicable answer from inspiring English sources

The thing for me about Ayn Rand is that her philosophy is the only one applicable to the world today – in every sense.

Seven out of the eight participants who provided only one answer gave an incorrect answer.

Where respondents had provided multiple answers, although only one answer was eligible, all of the multiple answers were removed for that question.

There is only one responsible answer.

There is only one right answer.

There was only one possible answer.

And there's only one right answer".

There is one and only one right answer".

Only one possible answer.

There is only one correct answer among the four options.

There is only one right answer here.