Explanation:

- R v Prince (1875): In this case, the defendant was convicted for abducting an underage girl, even though he mistakenly believed she was older. The court ruled that mistake of fact was not a valid defense because the act was inherently wrong.

- R v Tolson (1889): This case involved a woman remarrying, mistakenly believing her husband was dead. The court allowed the defense of mistake of fact because the situation was not considered inherently wrongful.

- Baily Case: This is not as widely referenced or relevant to the specific legal principle about mistake of fact in inherently wrongful acts.

- None of the above: This option would apply if none of the cases related to the principle in question.

R Vs. Prince is the correct answer.