AI Answers-provide answer от ExcellentTester

It will provide the correct answer, which may be almost invisible at the end of the sentence, hidden in text boxes, among the multiple-choice options (A, B, C), after a dot, or elsewhere in the question.

You need to have open router api key to use this addon

Mostly tested on moodle.
It supports multiple-choice and single-answer questions, fill-in-the-blank texts, short-answer questions, as well as drag-and-drop and dropdown exercises. Additionally, it analyzes images by linking the surrounding text with the questions and options to indicate the correct answer.