An example of A-Not-A Questions in English is "Are you happy or sad?" and the answer to this question must be an echo answer, stating either "I am happy," or the correct alternative ("I am sad").
An example of A-Not-A Questions in English is in (1.a) "Are you happy or sad?". The answer to this question must be an echo answer, stating either "I am happy," or the correct alternative ("I am sad").