It is called jury nullification when the jury ignores the law and acquits an obviously guilty defendant.
Answer: Option B
Explanation:
The jury is a subordinate body of citizens that assists the judge in his decisions or give a decision that is different from the decision of the judge. This body of citizens, in certain cases, has the power that allows them to exercise jury nullification.
And, declare an obviously guilty accused as not guilty based on the personal conviction of the jury members and their own persuasion of the matter.