RK-A2

Please change key prefix-question to prefix-question-single-answer and use it for the same current purpose when the MCQ has a single correct answer. Please add key prefix-question-multiple-answers and use it for the current purpose but when the MCQ has multiple correct answers.

Please modify other parts of the colab such as (a) adding a response for such questions and using the right dummy response in either case (b) checking that the AI responded with the correct set of answers etc.