Five courses—Anatomy, Biotechnology, Chemistry, Physics, and English—each of one month duration, are to be taught sequentially from January to May, though not necessarily in that order, by five lecturers: Raj, Sunil, Sonu, Ram, and Rani. - Raj teaches Biotechnology but not in April or May. - Sunil teaches Anatomy in March. - Sonu teaches in January but does not teach Chemistry or Physics. Which course is taught by Ram?

Seven boxes D, E, F, U, V, W and X are kept one over the other but not necessarily in the same order. No box is kept above X. Only two boxes are kept between W and V. Only U is kept below E. Only three boxes are kept between E and W. D is not kept immediately above V. How many boxes are kept between F and U?

In a certain building arrangement, the number of floors between Q4 and P9 is the same as the number of floors between S2 and which of the following?