Multiple Choice Questions - A cyclogical Warfare

Examiners can choose the same letter successively for the correct answer. After three consecutive answers with the same letter, many students may well start to feel confused and worried. Eventually, many candidates will start changing their answers simple because they don't believe that examiners would have half a dozen of more questions with the same letter one after the other. They can and sometimes do; this is a real test of your comprehension and reduces the possibility of scoring by guessing.