Study the following information and answer the question: Aunik, Rafi, Rahib and Zaref are students of a school. Three of them stay far from the school and one near to it. Two study in class IV, one in class V and one in class VI. They study Bengali. Mathematics, Social Science and Science. One is good at Mathematics only while Rafi is weak in Mathematics only and stays close to be school. Neither of these two nor Rahib studies in Class VI. One who in good at all subjects studies in Class V.