Correct Answer: Acquit

Solution : The correct choice is the third option.

Explanation : While "release" implies setting free, "acquit" means to free someone from a criminal charge, indicating a similar notion of liberation but in a legal context.

The meanings of the other options are as follows:

• Restraint refers to holding back or preventing movement.
• Confine means to keep within certain limits.
• Retain refers to keeping possession of something.

Therefore, the correct answer is acquit.