The book on which of the following subjects is kept on the top?
Data inadequate
C's book is at the top, and we are told that the book on subject R is immediately above the book on subject T. Based on the positioning of books and persons, it follows that the book on subject R must be kept at the top. This is the only arrangement that satisfies the conditions for the books.
Thus, the correct answer is (b) R.
Four teams – Red (R), Blue (B), Green (G), and Yellow (Y) – are competing in the final four rounds of the Inter-School Science Olympiad, labeled Round A, Round B, Round C, and Round D. Each round consists of one match between two teams, and every team plays exactly two matches. No team plays the same opponent more than once.
The final schedule must adhere to the following rules:
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