Seven girls, M, N, O, P, Q, R and S, are studying in the same class. Each of them is studying one of the subjects from Hindi, English, Science, CS, SST, Arts and Music but not necessarily in the same order. N got more marks than P and Q in English. R got less marks than M in Hindi while more marks than O. S got more marks in Science than Q and R and she is in the middle of all. O did not have SST and CS. P got more marks in Arts than S and Q. M did not have SST but got more marks than N. Who got the highest marks among them and in which subject?