The lcAnswerOption element was deprecated in DITA version 1.3. It was replaced with the lcAnswerOption2 element. It was originally intended to provide the content and feedback for a question option, and can indicate the correct option in a learning interaction.
+ topic/li learningInteractionBase-d/li learning-d/lcAnswerOption
... <lcAnswerOption> <lcAnswerContent>True</lcAnswerContent> <lcCorrectResponse/> </lcAnswerOption> ...