Directions:- Study the following information carefully to answer the question given below.
Five courses 1', '2', '3', '4' and '5', each of one month duration, are to be taught from June to October, one after the other though not necessarily in the same order. They are to taught by professors 'L', 'M', 'N', 'O', 'R'. 'L' teaches course '2' but not in the month of September or October. 'M' teaches course '1' in the month of August. 'N' teaches in the month of June but does not teach course '3' or course '4'. 'R' teaches course '4' in the month of September.
Which course is taught in the month of June?