(i). P, Q, R, S, T and U are six students procuring their Master's degree in six different subjects -- English, History, Philosophy, Physics, Statistics and Mathematics.
(ii). Two of them stay in hoste, two stay as paying guest (PG) and the remaining two stay at their home.
(iii). R does not stay as PG and studies Philosophy.
(iv). The students studying Statistics and History do not stay as PG.
(v). T studies Mathematics and S studies Physics.
(vi). U and S stay in hostel. T stays as PG and Q stays at home.
Which subject doess Q study ?