P, Q and R secured 45%, 50% and 60% marks respectively in Biology. M’s marks in Biology is 12.5 more than P’s marks and 4 less than R’s marks. Find out the individual marks of four students. A. For the students, total marks obtained for Biology is 311.5. B. Total of M’s and P’s marks in Biology is 147.5. C. R has obtained 84 marks.