733: In a tournament each of the participants was to play one match against each of the other participants. 3 players fell ill after each of them had played three matches and had to leave the tournament. What was the total number of participants at the beginning, if the total number of matches played was 75 ?
(A) 12
(B) 10
(C) 8
(D) 15
734: Which of the chronological order for the construction of the following is correct?
I. Taj Mahal
II. Qutab Minor
III. Fatehpur Sikri
IV. Agra Fort
(a) II, IV, III, I
(b) II, IV, I, III
(c) I, II, III, IV
(d) II, III, IV, I