Concept:Understanding the components of a multiple-choice question.Explanation:A multiple-choice question (MCQ) has a main part called the 'stem', which is either a question or an incomplete statement.There are several possible answers provided, which are called 'options' or 'choices'.Among these options, one is the correct answer, and the others are incorrect but plausible answers, called 'distracters'.The correct answer among the given options is specifically referred to as the 'key'.For example, in a question asking for the capital of India:Stem: What is the capital of India?Options:A. Mumbai (Distracter)B. Delhi (Key)C. Kolkata (Distracter)D. Chennai (Distracter)Here, 'Delhi' is the correct answer, hence it is the key.Answer:Key