The correct answer is C. of.
To acquit someone means to declare them not guilty of a crime. In the sentence “There being no evidence against him, he was acquitted of the charge,” the word “of” is used to indicate that the person has been cleared of the charge.
The other options are incorrect because they do not make sense in the context of the sentence. Option A, “off,” would imply that the person was removed from the charge. Option B, “with,” would imply that the person was given the charge. Option D, “from,” would imply that the person was separated from the charge.
Here are some additional examples of how the word “of” is used to indicate that someone has been cleared of a charge:
- The jury acquitted the defendant of all charges.
- The judge found the defendant not guilty of the crime.
- The charges against the defendant were dropped.